I mean, I wouldn't care who referred the paying user. I would optimize my blog to serve free and paying users to the best of my ability. I would hope that I could do that but I don't know what you are trying to do with your blog. Most blogs could probably be self-hosted with some caching and static layout where possible to perhaps avoid needing to use Cloudflare. I guess you already have to be using CF to have access to these paying AI crawlers.
Do you think that there is $25 of value in the creation of your blog, to say nothing of value that AI may be able to extract from it? (I'm speaking hypothetically, as I haven't looked at your profile to see if you link your blog, but I will do so now.)
Edit: I have checked, and I've read your blog before. I think the answer to the question depends on who is asking but I don't know how you feel about the matter. I think asking for folks to pay for free things is a different value proposition than a pay-per-use fee, so the economics are different. You're also offering something different when you give away a blog and monetize access to a community or something similar, which is different still to accepting donations and so on. I don't know what you do for work or if you do your blog full time, but I think it's cool that you make it all the same.