I agree with @nuthman here. As long as your doing good, influencing others to do good and sharing what positive vibe you have to fellow authors, I find nothing wrong about it. Bots are commonly abused but if used properly, they can be of great help.

@chbartist I love reading your posts since I got to read one of your posts and I have been one of your readers. I can see as well that, it is on your goal to help others grow by upvoting them. A lot of authors don't appreciate their readers as much as you do and I appreciate it.

All the best!