I think Blocktrades is limited to Steem/SBD -> other crypto.
I don't know of a way currently to get fiat (e.g. US dollars) from Steem/SBD directly. Changelly (just like Blocktrades) only works one way USD to Steem, not the other way around based on my understanding.
But again, the point is that you don't need accounts (like on poloniex) to make conversions on Blocktrades or Changelly. Downside is that you may be exposed to lower conversion rate (get less for the same money).
Aha! Good to know ! This stuff and trading etc. Is all very difficult and hard to understand. For someone that's never even dealt with trading or cripto before ! Thanks you were very helpful ! 😊👍
:) That's what Steemit is trying to sort out. A Social Media interface that works on top crypto but without it being right in front. It would indeed help to have some direct conversions from the Steemit wallets into USD and back that are a seamless experience to everyone. I hope we manage to achieve that sometime in the near future!