If she isn't expecting money now then what the ever loving fuck is the problem??!
Like I'm so confused. So she doesn't get tips anymore and they are just talking? Yet you still think she is "scamming" him. You story has too many holes man.
I guess the one remaining problem could be this: they get along and have a happy long-distance relationship without financial expectations, but then they agree to meet and there ends up being some kind of gang that jumps him and robs him. OR she marries him for a green card and uses him, something like that.
So, I guess it's best to keep following Ms.Gingersnatch's advice about advancing the relationship, as well as any good advice about being safe if and when they meet in person. Safety first!