The way to look at earnings from all the WGT sources, advancement, surveys, videos, winning tournaments, etc. is the same.
This is virtual currency only good for use on the site. You can buy via the Elite Collection but that is more or less just a joke. You can also use this virtual currency to buy into other games, ready go's, premium tournaments, etc.
You are just a beginner on the site. My advice is to just play with your WGT beginner clubs, learn the courses, make some friends. In about 3 months you will have moved up a few tiers and then start to worry about credits.