If you already have a Binance account, Blocktrades isn't any more convenient. In fact, Binance gives you the ability to quickly transfer Steem to and from Tether, allowing for seamless swing and day trading so that one can buy low and sell high. Signing up for an account isn't exactly complicated either.

There are also other services out there that are exactly the same as Blocktrades but give you a better deal and have more crypto options. I've used shapeshift a few times but Steem is currently disabled.

Blocktrades gets away with robbery because Steemit points people there and they aren't transparent about how many fees they are taking.