I've seen someone who does this - copies a bit of the post text and pastes it as a comment. Then, she/he/it upvotes it for $1 a crack - but doesn't upvote the original post. Rude.
Now, following the steem-bounty trail can be very useful - especially if you're looking for followers, go and put meaningful comments on such pages, make contacts/friends, figuring that people on the steem-bounty trail tend to be some of the nicer types. ;-)
Oh that is rude! But the Steem-bounty weighs the bounty poster with a huge leverage, so one wonders if it is even worth it to upvote your own comment with such a large weight?
Yes! I have come across that, too, @viking-ventures! I also came across someone the other day who posts recipes... when you comment, you get about a 1c upvote and a "thank you" response (which is fair enough)... and then she was upvoting all her own "thank you's" to the tune of 75-80c each!!
=^..^=
Oh, like that? That is a bit much....
Yeah, pretty sad. Just scratching my head, thinking "selfish much, lately?"
=^..^=