Yeah, you're right, the conversion occurs when drawing money from a wallet with a different currency to the currency of game that you're playing.
The problem is not that my preferred currency is GBP and I play USD games, it's that like a fish I have the "always auto convert back to your preferred currency when leaving games" option on and always have done, so my entire balance is always in GBP and auto-topups need to be converted where I lose between 0.1c - 0.9c every time.
My calculation is similar to
joeri's in the HSPLO Stars Regular thread, and it's probably costing me something in the region of $2k / year.
I guess I'm going to keep my balance in USD from now on, and figure out the best way to handle cashing out to GBP.
edit: below is the relevant screen in the pokerstars 7 client
Last edited by shimmy; 11-06-2014 at 02:10 PM.
Reason: pic