As Platinum you get 3f$ per post, and you can use them in the store (red nav bar) for forum features or professional services. You can buy, sell, trade on the forum.
Thanks for the quick reply. On my area it says I have 54 F$, I tried to buy a logo design for $19.95 using F$, but on checkout it said I did not have enough F$. I there an "exchange rate" posted anywhere?