No, In my opinion A lot of people moved to Steemit because of the money (including me)!
If you have a blog we deduce that it is your then we would have the possibility if we ant or not comments in our posts it´s only!
Other sites censoring I think it has nothing to do with comments but violate the terms of the sites
like here If you put something wrong against the community you get flag and You can go from 29 to 0 reputation and I do not think it is censoring