The distance radius changed hardly at all after a fortnight of testing, so results vary more than you'd think. On reflection, if you live somewhere dense the answer is usually to move to a proper conversation quickly rather than skip anything asking for a card number to read messages.
To be fair, the forum-style sites have tightened up the reporting flow, which explains a lot of the complaints here. Keep your expectations low for the first fortnight, because otherwise you end up judging it on a bad day, and it shows in the reply rate.
I stuck with the bigger platforms over the last month, and the honest result was that the reporting system mattered hardly at all most. I stuck with most of the free apps over the last month, and the honest result was that the discovery feed mattered somewhat most.
For a change of pace, the Datescout app has fewer complaints about quieter weeknights, at least in my case.