For what it's worth, the matching algorithm is the thing that decides it, although the ones with a paywall rarely say so. How do I start a hot cam chat with someone I met on here — seems like a simple question but I keep getting mixed answers depending on where I look.
My advice would be to keep the first message short and specific and then write a profile that gives someone something to reply to, though it settles down after a while. Even if people disagree here, the step that matters most is to skip anything asking for a card number to read messages: it costs nothing to try.