Thanks for the comment! Haha.. I also got to know about Steem Bounty very recently. On their platform, they do not seem to take any beneficiary rewards, however, you can choose to give them some if you want. For now, it does seem like it is quite an affordable way to gain some visibility.
I believe if there is only 1 comment, then the person will get the entire bounty. You led me to wonder, what will happen if there is no comment at all...