What most people do is instead of showing you or a vid on cam it's a screen of text. Each person has their own. And they assign points for doing different things on cam.
Smile=5 points Wave=5 points Blow Kiss=10 points
Bra=30 points Panties=35 Points Bare Ass=50 points
Bare boobs=50 points Pussy=100 points Full Nude=250 points
so on and so forth, then just wade through the sea of dicks and find a willing girl. like I said before the more options you have the better, if they can get up to a sorta high score they will sometimes go further then they would otherwise. You can find a ton of examples on here.
It's mostly hit or miss, but if you know how younger girls think and act it gets easier. And apply a little basic Psychology and your odds improve even more.