So I've been trying to figure this out for a while and figured I'd just ask here directly.
The account verification process tells you everything. Platforms that skip it are the ones you'll regret spending time on.
The free tiers on most of what I've tried are basically useless — you get just enough to see real people are there, then hit a wall the moment you try to message anyone.
Any input is appreciated, positive or a warning — both are useful at this point.