1. in my experience there are
some health supplement vendors (but not limited to them only) who are doing such activities to grab affiliate's commission.
2. it's more about particular vendor's mala fide intentions rather than vendor's terms and conditions.
3. If they tell you exactly their 'secret technique to earn while sleep' would you still promote such vendors?
4.
it's great if you're still making sales using 'normal SEO' and if using vendor's brand name in title + review. In my experience SEO/blogging is now almost dead until you're publishing on very high authoritive websites. ( i mostly found PR articles / sponsored post on news websites. now hardly find any CB health supplement ranking on health niche website rather than on news/PR websites!
I feel now you just can't earn any commission as affiliates without paying google/bing/ad networks. so SEO is almost became trash atleast what i feel today

-