Skipthegames has as many scams as it does legit escorts, never even heard of the others. Use tryst.link
Some do, the one I met didn't. But tbh that isn't what makes me think it's fake, it's the site you used and the bizarre responses. I could see her not granting a request to hold up 3 fingers, or even ignoring you for asking, but not trying to prove she's real in that way... by doing something entirely different jfl.
Even knowing nothing besides what you've told me, I can just about guarantee that it's a scam.
OP this is probably useful to you, at least insofar as to determine whether or not an escort is real. Not to say that someone who doesn't do any of this couldn't be real, but personally I wouldn't trust them.
Another thing is, do you just want sex, or do you want to do stuff like kissing, cuddling, and similar things? If you do, look for an escort who does gfe, that will improve your chances. But I think the definition of gfe is a bit subjective.