I do wonder about the percentage of IG eye candy who are actually making a living based on their looks, versus those working say retail to pay the rent. If attractive people of any type are becoming commoditized, one of would think it would become harder and harder to achieve success that way. Being pretty wouldn't be enough, there would have to be a spectrum of effective porn, actual porn, favors for a few, favors for many, etc.
Even in my own career (IT), there is a constant stream of younger, more X people willing to do my job for less money, as I suspect is the case with many fields. Experience and skill are the only counters to that, but I wonder if it is that much harder for people in industries based even partially on looks.