OKCupid had a blog (I believe it was called “OKData”, which had a few posts that agreed with the parent post. I believe that the blog was removed after an acquisition, but the content was published as a book, which is still available.
This chokes out competition, and users end up with several apps with some gimmick, but at their core they're designed to keep most users locked into actively dating, either to make the app seem popular, or to squeeze money out of them.
One of the deleted articles, which I think you refer to, was called "Your Looks and Your Inbox". Apparently some people have made copies of it online, for example:
Christian Rudder (main author of the blog) wrote his own book Dataclysm. It's separate from the blog though, that was called OkTrends and you can find the articles on archive.org.
