As someone who has done cuddling and likes it, I think there are true benefits.
However it is not for everyone, and to those who are worried about blueballs, yeah I can see a lot more of that then anything else. I mean use basic logic if a woman can get a bunch of guys to pay her to NOT have sex, does that make it more likely or less likely that she will offer up sex?
If you have great chemistry with her (just like at legit AMPs) maybe something will happened... but you know what having great chemistry that might/maybe lead to more is called "DATING!!!"
Like I wouldn't go to a legit AMP just because I hoped it would lead to more unless I was okay with the fact that it was far more likely I would only get a massage. Same with cuddling, and some of these ladies charge a lot, I would not recommend it unless the cuddling alone is appealing to you, if you go into hoping for extras you will be disappointed far more often than not.