The blog was removed after OkCupid was acquired by Match.com, which is another problem in online dating apps that isn't often mentioned. https://en.m.wikipedia.org/wiki/Match_Group#Dating_services_...

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.