I believe it is more of a 'use case' of the platform. Personally, I abhor and avoid anyone who sells paid advertising slots within their 'natural' photos, but I get that there are some people who will deliberately do this for $$$, and that there are product manufacturers who will pay people with an audience to do this.

I tend to follow niche manufacturers (of guitars or other handmade instruments) directly because I am interested in their 'behind the scenes' photographic essays. No need for me to see them draped over someone who has no idea about the product but will happily drape them over themselves at some ubiquitous beach sunset shot.

I don't think it is a 'class' thing as much as it is a 'positioning' thing.