I'm suddenly seeing a lot of bot accounts using the hashtags I use on a regular basis. For example the bio will read

"Follow me if you're interested in the castanwyddeneccles hashtag. I'm a global hashtag sharing bot from tags.pub. When content with the castanwyddeneccles hashtag appears on the Social Web, this account will re-share the content to its followers."

Is this a thing now? I don't think I like it, and I'm blocking them as they pop up.