The pattern I keep seeing is that the ones with a paywall have changed the matching order without saying so after a slow start. What dating apps are specifically designed for younger women looking for older men — seems like a simple question but I keep getting mixed answers depending on where I look.
Give it a full week before judging, because it costs nothing to try, and it shows in the reply rate. Speaking personally, I'd avoid opening with a compliment rather than write a profile that gives someone something to reply to, since it saves a lot of wasted evenings.