So, if you're at IB and you do lots of volume and you add liquidity and you should definitely choose the unbundled rates. If you're at IB and you don't do much volume and you remove liquidty then you should choose the bundled rates. Would it be worth it and possible if you could make (2) IB accounts, where (1) account is charged the bundled rate where you send all your market orders and the (2) account is the unbundled account where you send all your limit orders? Opinions?
It is strictly forbidden to trade with yourself on stocks so do speak and even if it would be possible, there are many hidden orders in the market.