I honestly believe that with a simple Hey customer here is your chance to move your toons to any server you want....this is a 1 time offer and will be open for X amount of time....after this time if you want to move there will be a charge....This will include moving region and server types IE US to EU, PVE to PVP......
After (insert date) has passed the charge to move servers will be (insert amount)
This will im believe decrease the amount of server transfer posts being posted day after day......