Yeah it boots up the games ID so that it shows you as playing it.
As far as banning goes I won't say 100% no but me and many others have used it for idling cards. I've been using it for the past year. Last I recalled the game opening the appID can't be distinguished since it's the same code that would run if the game was installed on your computer.
JaseC can explain it better.
Is it safe to use? I never did dabble with this
Well I just read the faq on the page and I guess it is safe, lol
I got it working, that's so awesome, now I can get all those cards for those games I own but haven't got installed. Thanks!
All it needs now is a card drop detector and a scheduler so you can just add games to a playlist and have it cycle through them.