Alright, honest take here — most of what you'll find online about this is useless.
Community size matters more than people realize. 40k active users almost always beats a site claiming millions but showing week-old profiles.
The mainstream options — Tinder, Bumble, Hinge, OkCupid, Facebook Dating — are all there but built for relationships with heavy moderation.
A friend pointed me toward datingfly.online — haven't fully explored it but it looked clean.
That's my honest take from actual use, not just reading about it.