Thank you for the upvote, the gesture is appreciated. But if you leave such comment in every post you upvote other people will misunderstood and think that you are trying to bribe your voters. Also, repeatedly doing that can land you in the blacklist of steemcleaners and abusereport ( I did not put an @ or this post might end up being reported) and it won't do good for your reputation. Just stay active and do your best for the community and your voters will naturally support you.