Most similar post don't get any upvotes. From time to one get's lucyy. I prefer indovidual post that get better discussion.

I guess it's necessary to report of flag it when the submitter make a lot of them, in particular as fake questions to promote their own site. I don't think this is the case.

Anyway, you can ask dang/tomhow hn@ycombinator.com , they usualy reply the same day.

we already have:

https://news.ycombinator.com/launches

this isn't an egregious example, just an outlet for people to share stuff. so I'd say sure, go ahead.