Base on my research (cough using google cough..), the industry average for live cam models ( after whatever streaming platform took their cut, which is anywhere from 30% to 50%), are between 60K USD (so so models) to 200K USD (for top models) per year, cash in hand. So, I'd say it's a pretty good pay grade, professionally speaking.
Free Porn is everywhere nowadays, which is why cam show business is exploding, because it's REAL, with interactivity. Basically, you can talk to the porn stars, and control what goes.

Just take a look at LiveJasmin, the top dog, the Google and Amazon of webcam business. Reportedly 31 million users a day, 21 million USD a month in revenue.

https://www.xbiz.com/news/234806/livejasmin-reports-successful-start-to-2018-hints-at-future-growth