For example bumble promotes profiles that are new in an area. In theory that sounds good, if you move somewhere it gives you a little help meeting people. In practice, this means that a huge number of profiles I see are just people at the airport. It also means that I get most of my matches when I'm traveling. This way Bumble gives me the dopamine hit of getting multiple matches per day (which never happens at home for me), while reducing the risk I'll get into an actual relationship and leave their service.

That, plus their shady handling of user email addresses, has gotten me to prefer other apps

https://www.youtube.com/watch?v=7q0M12pOmQk

It does make we wonder what their pitch to investors looks like.