No, they lose their popularity because that is the nature of the algorithm in porn, also the turn-around times on celebrity in porn is absolutely ridiculous.

There are a number of stars that have built a brand that's endured into their 30s, 40s, even 50s. The algorithms tend to churn new starlets and then salt the results with the popular veterans, in the same way music stations will rotate between oldies and newer hits.

Even then, there's some pretty straight lines between porn work and any other form of social media monetization. Getting your own label and a bench of your own talent is fundamental to getting the Real Money, since so much of any media enterprise is built on grifting the newer recruits. Finding whales to finance the bulk of your operations is vital to a sustainable enterprise, because those parasocial bonds are what will keep you in business relative to the flakes who just peak in on you for free from time to time.

Really, just watch The Producers and do whatever Max Bialystock does. Yes, that includes working Hitler into your performance. Guaranteed ticket to success.

Porn is an incredibly exploitative industry, but it has mostly to do with the complete lack of job security, regulation, and turn around in the industry, less to do with trafficking

I mean, its not unusual for ex-stars and starlets to move into the back end of the industry. The exploitees become agents of the exploiters.