I'm do self-vote on my post (not comment) because my steem power still small... and i think everyone with small SP do the same thing. Because we want see dollar in our post..
And i see why people with big SP didnt do this, because with just 1 vote to anypost they like they can see a big dollar especially if they know the best time to vote like minute 20 until 30 from the post published.
Anyway we all want the best for steemit. Cheers..