@LightPrincess @respectful
That's correct. As a Pro here you can't routinely give free sessions as it would make oversight far too difficult for us. However, if you want to do it on a rare occasion then you'll probably be ok. But you should make this very clear in the online conversation with the client as to reduce the chance of a moderator finding the activity suspicious.
Is there a way to leave anonymous Karma?
Not that I know of.