Steemit was designed to discourage spam. I had real spam in a comment yesterday, but that account was flagged to nothing very quickly.

As it stands a top post may have hundreds of votes, but very few comments. That suggests to me that people are voting for curation rewards and we see a lot of voting bots out there. I don't see many comments from the whales who vote up my posts. I hope that as Steemit grows we will see more engagement