The ERC223 token standard has been accepted by the ethereum foundation as the newest and most scalable eth standard. They themselves are pushing for its use and adoption. It is inherently more secure and prevents loss of tokens which isn't the case with the ERC20 standard. ERC223 is also backwards compatible with ERC20 which is why the token was easily integrated with myetherwallet and etherscan. When we were developing mobilego we spoke with ethereum experts, and realized that this token standard would be the most scalable. We then contracted blockchain labs (a reputable blockchain company) which vetted our contract and approved it for safe listing on exchanges. Even still we sent the contract to bittrex more than a month prior to the initial listing to have their developers vet the contract and make sure it would be safe for their users. They confirmed that he token contract was ready, however due to the updated nature of ERC223 they didn't realize their current smart contracts couldn't handle the new token. We urged them to upgrade, and they explained that the upgrade could take weeks to months, and that it had been on their project timeline. This doesn't mean all exchanges can't list ERC223 and the industry is moving towards this standard anyway. It to has been frustrating for everyone to not list on a larger exchange after following proper procedures, but we stand by our choice knowing that the inherent benefits to ERC223 will only facilitate the adoption of MGO in the future.