Angelo Castellani (@caste_ai) header
Angelo Castellani (@caste_ai) profile picture
Vibe Planet🪐
Joined February 2019
Marketing agencies are going to HATE this post You pay them a fortune every month to do some shitty marketing job, only to get you ZERO customers We just replaced all of it with one Lifetime Payment. Pay Once. Get marketing Forever Website → Creatives and Videos → publish to your socials → launch the ad campaign. You finally stop being the bottleneck in your own marketing If you sell monthly retainers, don't watch it 👇
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We just started ours and Copilot citations went from basically nothing to this
going to be an interesting quarter in tech: > the fastest-growing tech companies I talk to are pushing hard to get ahead of Agent Led Growth (ALG) > smart Founders will build Agentic Search Optimization (ASO) moat for their company > marketers at high-growth tech companies will become famous for the ASO programs they champion > 9 months from now they'll be ripping explainer videos on X like @hectorserrranoo and leapfrogging their peers, getting offered insane comp packages from competing and adjacent companies > years from now every founder and marketer on earth will yet again ask themselves why they didn't take advantage of such an obvious growth wave
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25% higher CPL and it still won on revenue
We just ran the numbers for one of our big finpub clients. 5 days into November and our top spender is an ad built on last month's market sentiment. Cheapest leads. Best engagement. Meta loves it. But after digging into the backend, another ad is getting way higher revenue per lead...even though the CPL is almost 25% higher. So from a CPL standpoint, the old ad wins. From a ROAS standpoint, it's not even close. Here's why this happens and what we do about it: 1) Meta optimizes for what you tell it to If you optimize for leads, Meta finds you the cheapest people willing to opt in. Not the people most likely to buy. Those are often two very different pockets of people. 2) Market sentiment moves faster than your ads The ad that crushed it last month was built on last month's market. The people BUYING this month might be a different person entirely. Your top spender can be a winner in Ads Manager and already be losing on the backend. 3) You have to track revenue per ad Newsletter funnels are long. Meta won't see the sale. You will. So track UTMs all the way to revenue, and move budget manually based on who actually buys. If you don't, you'll be the newsletter operator that spends $100k+ on leads from Meta, sees they're SuPeR eNgAgEd aNd hIgH QuAlItY...and then generates zero buyers for your advertisers. They won't renew. Your own offers will collect dust. ROAS >>> CPL
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So Figma gets the first look and the agent only touches the last 10%?
I still start every screen in Figma: layout, hierarchy, the first look. Motion, states, real data and the last 10% of polish happen in code. Starting in code is how you end up shipping whatever the agent suggested.
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60 days of UGC and already a car?
Sideshift changing lives 🔥 One of our UGC creators we found on Sideshift just bought a car just 60 days in working with us Many more success stories like these to come
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Are the 1-star reviews coming from paying users or free ones?
last week i pushed an update to my couples app with 1,000+ monthly active users i have been SO HYPE about it, i think its 100x better but some of the reviews from active users say otherwise, so far...
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Most agent stacks I see cover build, bugs and data. Who's running distribution?
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Quindi i banchieri tornano su Excel?
Dopo aver incoraggiato il “vibe coding” tra trader e banchieri, Goldman Sachs cambia approccio: gli strumenti di intelligenza artificiale più avanzati saranno riservati ai soli ingegneri. La stretta arriva dopo una fase di sperimentazione che ha aperto dubbi su produttività, sicurezza e gestione del rischio. Il servizio di Alice Scalora
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Maybe $0.00006 a head, if the trial converts lol
wild day yesterday, this post and 1 other brought 100,000 people to my website in 24 hours... how much money did i make from it? maybe $6 if that one weekly app trial converts
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Three feature cards and a logo row, I could draw it blindfolded
Ask an agent for a landing page and you get the average of every landing page it's seen. Centered hero, three feature cards, a logo row, a testimonial grid. Nothing in it is wrong, and nobody will remember it.
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In marketing the insufferable gatekeeper was always the agency retainer
The great gift of agents is how they allow you to route around every insufferable gatekeeper in software.
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He got paid $400 to rewrite a vibe-coded landing page that read like AI, and he did the rewrite with AI. The client was paying for someone who could tell the copy sounded off.
Started targeting vibe-coded websites written in AI-slop - not only X but Y - three sentence rule - increasingly - rather than I started with consulting firms (mostly in Europe) and got on calls with two founders yesterday. Closed one today (just $400/landing page) And guess what? I only needed to rewrite one from scratch, screenshot the pages and instructed grok to give me the prompts that produced the landing page. Then I fielded it into Claude to generate a new landing page and designed using their brand identity. Maybe a side hustle to make quick bucks
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If you're in growth and your github is not like this in 2026 your ngmi
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Geist Serif is gorgeous. Love a dev tools company that cares this much about type.
Introducing Geist Serif.
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People trust a stranger holding a phone more than your brand. 57% of our signups said they found us through a UGC-style video ad on Instagram, more than twice our targeted Instagram ads. We're launching something built around that soon.
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This is the team behind every Vibiz ad. None of them can launch or spend until the owner hits approve.
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Nobody asks which accelerator you got into once you have revenue.
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Five years flat, then $50k+ ARR in three months after fixing pricing. Most founders would rebuild the whole product before touching the price.
SendFox was flat for 5+ years. 😬 In the last 3 months we grew $50k+ ARR. What changed: 𝟭- 𝗙𝗶𝘅𝗲𝗱 𝗣𝗿𝗶𝗰𝗶𝗻𝗴. We had lifetime deal (LTD) pricing for sending email so the more someone sent the less we wanted them to use the product. We improved the LTD offering and created super affordable pricing for bigger senders. Your heaviest users should be your best customers. 𝟮- 𝗨𝗽𝗱𝗮𝘁𝗲𝘀 𝗮𝗻𝗱 𝗦𝘂𝗿𝘃𝗲𝘆𝘀. We email about twice a month all the changes and made a public changelog. Also, we send surveys and got tons of feedback about what improvements customers actually wanted 𝟯- 𝗨𝘀𝗲𝗱 𝘁𝗵𝗲 𝗽𝗿𝗼𝗱𝘂𝗰𝘁. We added MCP so for the first time in 2 years I'm emailing my list again. This helps me find out how shitty it is and I can easily fix the things I want to make it better. No real goal to make $1m ARR but just grow something people like and we like. I'll keep posting updates.
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Running a company on agents has the same problem. Before you add an eleventh you need one place that shows who's doing what and what's waiting on your yes.
should I be worried that I have 10 different agents with full access permissions to my personal email and running automations and I’m not sure who is running what Filtering a lot of spam, though!!!! Worth it?
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Everyone can ship now. The ones who win still decide what looks right.
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