Kinda yes, kinda no...lol!
I've bought maybe 40/50 dollars in credits direct from WGT to get clubs, at the time I was not aware of survey's, videos and "offers", then I have taken up on some offers since for printer ink a few times, and Gamestop?...when the kids were into the XBox...
truth be told had I not played MPC's whilst tipping a few cold ones...I'd have never had to buy credits:)