Starting a thread on sexx chat rooms that allow audio-only broadcasting because the existing advice contradicts itself. Nothing about broadcasting chat rooms changes the fact that the deciding factor is the depth of the profile fields, based on a fairly small sample. The audio-only broadcasting case is instructive — the time it takes to get a first reply is the number worth watching, not the size of the ad budget.
Same story on audio-only: half the frustration disappears once you write the bio for one person rather than for everyone. The audio-only chat rooms angle is worse, because most of the disappointment traces back to the signal-to-noise in search. Audio-only is where I'd start, since the honest advice is to test the search filters before uploading anything, speaking only for my own city.
For audio-only in particular, the signal-to-noise in search is worth more than raw member count, going by the last year or so. The part of sexx chat rooms that allow audio-only broadcasting people underrate is that the practical move is to check whether a profile answers questions or deflects. Happy to be told I'm asking the wrong question about audio-only chat rooms.