Yes I also don't see any harm buying upvotes, I am also doing that because I belive in investment. But sometimes I like to get free upvotes this why I try to support the quality. Those who upvote nonsense comment buy buying upvotes for that I think are just losing their money for nothing, most smart people in steemit just mute them and never see never from them. The thing that I hope for is to make moderators on steemit to block such users because they just don't deserve to be here.