Worth saying that the decision to skip anything asking for a card number to read messages did a little more for me than switching platform, so results vary more than you'd think. What are the top adult meeting sites for people looking for no-strings-attached fun — seems like a simple question but I keep getting mixed answers depending on where I look.
If you keep getting the same profiles, avoid opening with a compliment — the difference in reply rate is obvious. Something worth flagging is that the ones with a paywall have dropped the feature everyone used after a fortnight of testing.