Wow!, you fellas lost sight of what the op is asking.
Jay, the $1.50 you've received from WGT for tier advancement is correct. You'll need to place in the top 70 in order to win credits in the weekly, and monthly tournaments. With plenty of practice, you can try your luck in the Ready-Go tournaments too. You can complete surveys or offers like the other posters have alluded to as well.
In order to improve your game, you'll need to upgrade your clubs by visiting the pro shop. I would suggest playing a little while longer with the starter clubs and advance in levels to get the clubs you can use in the Master tier, this way you won't need to keep purchasing equipment.
Upgrading to a Tour GI-SD golf ball is a good start to scoring better in the weekly, monthly, and Ready-Go tournaments.
Good Luck!