Not sure why you were downvoted. You tagged it with NSFW which is correct. I think if you gained an audience, with unique content, and ensured your posts were tagged with NSFW, then you should be fine. Maybe complain in #steemitabuse-classic on the Steemit chat.
The key difference between UnderSteem and Steemit, is that NSFW can show in ALL categories, where-as steemit restricts it to the NSFW tag (i.e. you have to go manually looking for nsfw to find it)