"Pages of product affiliation where the majority of the site is made for affiliation and contains a limited amount of original content or added value for users."
Also, the site may not comply with this policy: https://developers.google.com/search/docs/advanced/guideline...
"Sites that copy content from other sites, modify it slightly (for example, by substituting synonyms or using automated techniques), and republish it"
While I have seen much poorer quality affiliate sites than this ranking in Google, IMO this model is on borrowed time. I think the way to survive in this market is by increasing the value:affiliate ratio, and diversifying income sources, so affiliate revenue isn't the sole focus.