I was working at a Parisian dating startup about two or three years ago, we had that friends of friends kind of vibe (it was actually called that) and it didn't prevent us from failing.

More men than women on those websites, the few women you get don't engage anyone for some reason so you usually end up having to buy cheap leads on silly marketing platforms and fake all the figures (men/women ratio, number of users, etc). Good luck though.