Here is my experience. I contacted TG to assist me in changing my facebook acct set up, as I changed it. Once I did everything, from that moment going forward, no points received. I linked the account to my Foursquare application, and the same, no more points. Once you contact them, they can see your activity. I've never received any emails notifying me that I've been violating their TOS, just flat out no more points.
Once it stops posting points for you, it is pretty much dead.