What happened to "rate my startup" posts

"Rate my startup" posts used to be a big part of HN, but they aren't anymore.

I really miss them. They were a great way to get feedback for a new startup, a great way to give back to the community, and a great learning experience for all of us. Some great startups were launched on HN - here's a link to one where this guy Drew launched something called dropbox: https://news.ycombinator.com/item?id=8863

So what happened? has the community forgotten about them? Have we just moved on? Were there too many problems with spam-posts?(1) Or did everyone just launch their startups? :-)

(1) In this 3 year old post https://news.ycombinator.com/item?id=1861577 PG told us that there had been a problem with new accounts spamming the site with rate my startup posts. Presumably a cheap shot at getting visitors.