https://www.firstpost.com/tech/meta-is-planning-to-deploy-millions-of-ai-bots-on-facebook-and-instagram-as-user-base-shrinks-13849279.html

They've recently announced that they're going to do this but undoubtedly have already started. It's a great way for them to shape algorithms, teach its AI and further enhance their dark arts of propaganda and manipulation. There's a high chance that if you've been argueing with a randomer on Facebook/Instagram, you've already been engaging with a bot and contributing to its evolution.
Skynet in its nursery school stage.