yeah, sometimes the rates can be very high, definitely double-check them and do the math before going through with it. also, if you can catch it at a time when SBD is spiking, for example, you can get even better rates. the thing is, unfortunately, if you've gotta move your money out, even 90% is better than have 100% stay indefinitely in a state of limbo. the other (centralized) way people seem to be "comfortable" doing it is to go STEEM/SBD -> bittrex -> eth/ltc/btc -> coinbase, which of course comes with it's own set of risks, issues and various associated fees as well.