I use Steemvoter to vote for two rl friends who consistently create quality content (@techslut and @poet). Minnowbooster and minnowsupport are different bots. I like about minnosupport (aka reg-msp) that it's a part of an overall community effort to help planktons and minnows. And that it gives, at most, one modest upvote per 24 hours per user, so it's not a drain on the reward pool.