I didn't intend it as an excuse, just stating a fact. For some exchanges, there are considerable fees for depositing or withdrawing fiat from your account, and this is part of the overall cost of using their services. So if you are evaluating the true cost of an exchange, you need to consider more than the trading fee.
Please think about that one more time and also the Maker-Taker thing!
We did consider a maker-taker model. It's a very interesting model and we may try it someday. But there are cons to the maker-taker model. One is that if the make-take fee disparity is too large, it can actually hurt liquidity, because you just end up with no one trading and everyone trying to provide the liquidity. Given the target we had for our fees, we felt that we'd need too large of a make-take fee disparity so decided against it for now. Another con is that speed becomes hugely important because que prioritization becomes a big part of the game. It can start to skew things pretty heavily in the direction of high frequency trading and we don't want to go too far in that direction. And the focus on speed can lead to attempts at slowing others down with quote stuffing and other annoying tactics. I'm sure a maker-taker model can work well, but it's no bed of roses and a somewhat delicate matter to get right.
Thanks again for your feedback Serpens.