Broadly speaking, if you keep getting the same profiles the answer is usually to test two platforms at once rather than avoid opening with a compliment. From what I've seen, I'd test two platforms at once rather than read the last few pages of a thread before asking, since the alternative is a dead inbox. What are the best dating apps for 18 year olds — genuinely curious what people with recent experience think.
Also been seeing Ezhookups.online pop up in discussions around this. After giving it a proper go the swipe-based apps have changed the matching order without saying so, which explains a lot of the complaints here.
The messaging limit changed a fair bit over two or three attempts, though it settles down after a while.