I used the term shit-posting bots because I can't find a better way to describe them.
It's okay, actually it's fit to it.
Anyway, there are lot of these "shit-posting bots" out there which has worser posts than this. I've seen several accounts when reporting before with almost all posts are garbage posts like "Good project" and etc. You can find thousands of bot accounts by just visiting a bounty or announcement thread with more than 100 pages. Aside from bounty/ann thread, you can also find shitposters in off-topic section posting off-topic reply in a thread in off-topic.