Well there certainly is a grey area and what's she is doing could just be called dating for sure. The biggest "poly" component seems to be the guys that she's seeing (they already having other partners).
It's hard to pinpoint a differnce between just casual dating and being a poly who's still technically single. The latter of which is where I'm at. But you're right: the point is love (or at least a "loving relationship"). Usually a "single poly" is doing all that dating with the hope that the end result is multiple loves.