You asked about Advertising
9 people built something like it. 9 are gone.
That is 100% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2022-06-01 | Uncover high-fit leads already silently engaging with your brand · customeros.ai | gone |
| 2020-01-01 | YCPaneau Tablets inside Uber/Lyfts to advertise directly to riders · paneau.io | gone |
| 2018-06-01 | YCGrabb-It Grabb-It is a location based Dynamic Digital - OOH advertising… · grabb-it.io | gone |
| 2012-06-01 | Mobile advertising · lean.com | gone |
| 2011-06-01 | YCVapor In-video advertising. · askolo.com | gone |
| 2017-06-01 | First agentic AI-powered community for 1 billion people with criminal… · commissary.club | gone |
| 2016-06-01 | YCCoinTent Recover revenue lost to ad blockers · cointent.com | gone |
| 2015-01-01 | On a mission to programmatically automate, optimize, and unify your… · kuhcoon.com | gone |
| 2012-06-01 | Attribution metatags for online content. · credictive.com | gone |
How this compares
The register re-probes every domain it holds. Some that answered last month stop answering. We send that list — what went quiet, and what it was — once a month. Nothing else.
How this was made. Show HN entries are every post from 2021 to 2023 with at least five points that linked to its own domain; code hosts and free hosting are excluded, because a repository outlives the effort behind it. Product Hunt entries needed 100 votes — a far higher bar, so they are the promoted top slice rather than a like-for-like sample. Both are judged by asking the domain whether it still answers: gone means it no longer resolves, refuses the connection, serves a parking page, or says plainly that it shut down. An HTTP error is not counted as gone — a server answering 404 is one somebody still pays for, and an audit of 25 gone-calls found two such sites alive with only a moved homepage. Y Combinator entries use the status YC publishes itself, which is why only those can say acquired. Squatted domains — a lapsed name now serving somebody else's site — are not detected, so these figures run slightly low.