Yuck with the penises and all that? How the hell you supposed to fuck a penis anyway? What're you supposed to do, dock em or something? I ain't going near no gross dick. I mean sure, if she looked hot and I went to pull up her skirt after I had a few drinks in the bar and suddenly there was a dick... Well I don't need to look at that when I'm tapping that ass from behind. It's not like I'm gay or anything though. Sheesh. Weirdos.
Honestly, dating apps are one of the cases for a federated system. Use whatever frontend you want, no one person owns the backend so they can’t sleazily monetize you. Probably would need to be a bit more cryptographic than something like lemmy or mastodon though.
With activityhub gaining traction, I actually think it's possible. You essentially self host your profile, which gets federated around. You swipe left/right, thereby accepting federation from a match of blocking.
Depends on how it is used. But I don't think it should be used for the matching process itself though. Maybe to help match interest (tags) between each other, like giving a connection score between two of them, but other than that, I see no other privacy respecting way to use that.
Moreover, on which data would we train on? I don't think there is any anonymized dating app dataset around.