I wouldn't say it if it wasn't true. If you're not getting the upvotes you'd like maybe you need to be a better follower.
The polite thing to do on Steemit is to upvote a post that you comment on. If it's worth commenting, it's worth upvoting.
And if it's a sincere comment, and they have upvoted your post, it's polite to upvote the comment. The menu that drops down when you click on your picture has an option that says REPLIES. That's where you check to see who has left you comments.
That's it. Go feed the plankton and find some quality followers that know when to upvote!
@Lahvista