Since you are having trouble understanding the post, I will go ahead and explain it to you further so others don't get confused with your posts.
OP:
For a dedicated and highly talented fighter, he would be mid or top tier and thats where all the prospective earning opportunities would matter for some one passionate about a career.
Compare mid tier boxers to mid tier mma fighters. By mid tier, I mean they bring in viewers, maybe around 50K-600K viewers and upper mid tier would be on the lower end of ppv scale, bringing in less than 500K buys. Also ufc fighters have hardly any opportunities for sponsorship deals, while boxers earn quite a bit from sponsorship deals etc, not only their guaranteed purses.
I stated as if there was a highly talented fighter, who had the choice of turning his skills into a career, he would likely peak as mid tier or top tier fighter, and he would look to those mid tier and top tier fighters' earnings as prospective earnings for themselves in the future. For example, look at Jordan Burroughs, one of the most highly decorated wrestlers in the game, and when asked about transitioning to mma, he declined saying the money is just not worth it.
As for categorisation of mid tier and upper tier fighters in the context of fighter pay, I clearly stated a general idea of what would be a "mid tier" fighter or "upper mid tier" fighter. Its how many views they bring in and I quoted my original post again here so you can understand better. Don't mean to be rude, but literally stated every single point of discussion in original post.