They have long way to go. Because there are a lot of domains with much better backlink profile than any affiliate portal and as LuckyBuddha said: on authority domian is the relevant content, so where is the problem? That the owners put few right prompts to AI? Because the content is AI generated, the website is AI assembled and the place where to put such a link or whole high authority domain is likely also chosen via AI?
If this has to stop, they have to either discard the site authority, which is possible only if they switch the SERP algorithm completely to internal GEO = the google algo and ranks will be only AI powered. It is happening and will happen. But I guess Google has still fear of this step or maybe the costs of it are too high (I guess it should not because they can use the most powerful AI model for each keyword and cache it and work with the cache but maybe I am missing something)? So I guess they are just conservative until the point the SERP will be totally spammed.
If you talk to God, you are praying; If God talks to you, you have schizophrenia.