There is no “best” recommendation overall for what format is ideal for a rebate program. It depends on your preferences as well as the costs of trading with a specific broker.
We suggest that you check out a few different Forex rebate programs and brokers. Check the transaction costs the brokers charge, and then do the math to figure out how much you would be saving through different brokers and rebate programs.
Based on your calculations, you should be able to figure out which broker and program will offer you the best value.