The value proposition is just too high to not do it, especially if you are a "celebrity" or known entity with little to no current income. The math is simple.
She currently has 2 million followers on IG. If she can convert .5% (one half of one percent) at $10 a month, she can bring in 960K per year after giving only fans their 20%. Its hard not to do it. Every female celebrity(musician, actress, and athlete) should be doing this. WNBA players could make 5 times their salary.
In Lisa's case, she's on the clock. Movie rolls have dried up. No magazine covers. No ballers trying to wife up. She now recognizes that her looks are a depreciating asset. She can try to hold on to the body, but that face looks every bit of 50.
Unfortunately, we will see more and more of this in the near future.