They trained on your posts for free. Reading one back costs half a cent.
Summary
Major platforms like X, Reddit, and Stack Overflow have established a three-step cycle to monetize user-generated content: utilizing free user posts to train AI models, charging users to access this data via expensive API fees, and banning users who attempt to interfere or delete their contributions. This strategy treats user writing as a commodified asset, effectively locking content behind high paywalls while enforcing perpetual licensing rights that prevent users from reclaiming their own work.
(Source:Blog Nathanlangley Dev)