Most major sites these days have a referrer policy tag in their HTML that allows at least the domain of the site to flow through. But I think they also ban accounts for posting direct Amazon affiliate links on places like Reddit anyway. Amazon is similar to Adsense in its propensity to ban and confiscate earnings without legitimate reason, and sometimes without explanation. Personally, I wouldn't waste time or money sending traffic to them. It's like building a house on quicksand. CPA networks are far more reliable if you want to be an affiliate marketer.