My blog posts, into which I put considerable time and effort, and which (sometimes) contain material not covered elsewhere, are probably part of commercial LLM training data.

Does that comply with the licence? No.

Does it infringe copyright? Probably, IMHO, from an English law perspective. Other jurisdictions, YMMV.

Is this "stealing” or “theft”? No. I get that this is an emotive topic, absolutely, but I thought we had moved beyond “copyright infringement is theft” 15+ years ago.