Currancy Exchange

ok heres my idea we all know you need money for Z8 points or do surveys ( which i hate )
so here my idea a currency exchange and to make sure it dosent get over populated with z8 points my currency idea is this
1 z8 point for every 10 GP
so if i want to get 300 z8 points ill type in 3000 GP
what do you guys think?