You aren't going to have a choice - anything you make available on the web will be consumed by AI regardless of the license. That is essentially going to be the primary purpose of the web going forward, to provide training data for AI.
I wonder what this means for SEO. If someone develops content and someone else then generates very similar content using AI, how do the search engines know who to rank higher?
I suspect both SEO and search engines as a concept will be made obsolete. SEO doesn't even make sense when machines are creating the content and consuming it. AI is going to be the primary UI for software applications in general, so you won't even really use a browser, you'll talk to an AI (probably directly integrated with your OS) and it will generate content or dynamic applications on the fly - you won't ever even interact with the web directly, much less with human-created content.
Everything evolves. The internet existed before the web, and we navigated its content. The web existed before search engines did, and we navigated its content. Content and ways to navigate it will continue to exist once search engines are no longer relevant. Maybe SEO simply doesn't matter?
SEO will become LLMO, with the added bonus that if you do it right, you can get the LLM to lie in your favour.