An explanation of your position might help.
I've been a member since June of 2007. I've never had to put out a dime of my own money and I have never played for credits. I don't pay entry fee tournaments or green fees to play games. Videos and surveys bought my clubs and golf balls here.
The game itself is not crooked. The company doesn't treat its customers particularly well but it's not crooked. The game play is not crooked; only many of the players who are using the system in place to cheat others out of credits are crooked.
Yes, they want me to spend because WGT is a business. Spending cash is not necessary, though, if you have the self control to play it like an online golf game instead of an online gambling game.