No, you shouldn’t have posted it to Reddit, in which you were required to give them a perpetual license to use your IP in any way they see fit.

For the record, I’m here because Reddit pissed me off when they axed the free API, and I’m pissed at myself for not expecting it. That’s what I get for accepting their terms and conditions, I guess.

Edit: I also don’t accept the idea that using my content for training data is “fair use” when it is used to train proprietary models, especially ones in which the end user is allowed to prompt it to plagiarize or otherwise imitate my content.