New York-based crypto exchange itBit has staked some ten percent of the Ethereum ($ETH) trading market by adopting an alternative trading model: maker-taker. For low liquidity exchanges like itBit, the maker-taker model increases the exchange's liquidity by incentivizes traders to add liquidity through rebates. Conversely, traders who take liquidity are charged a fee. The maker-taker model is fairly common for U.S. equity trading, but new to crypto and will soon be under review by the Securities and Exchange Commission. As new exchanges enter the market, price undercutting is spurring innovation.