If your post does not have "good quality" in their view, Smartsteem will blacklist you. They have declared that the blacklisted people will not get back their transferred money. This is very very bad. If they don't want to provide service, no problem. But they should not withhold the SBD which people send to them for up-voting. They should return the money.
Another point is that even though you have prepared the post yourself, without copy-pasting from anywhere, they may find it low-quality. I was blacklisted by them. But I could not find any reason for that. It was a news item which I prepared myself. It is possible that the reason may be that it was not a long post. Only a few sentences were there. My post was this:
I tried to communicate with them...But no response !!!
Before sending your SBD to them, please be careful !!!