The simple answer is money. It's a shame to say it, but by investing some of her early money in a boob job, dying her hair and getting some dental work (probably those stupid laminate things) She probably makes 2 to 3 times as much in the industry by fitting a more marketable "type". And you're right, she's probably out doing tours of strip clubs now as "our special guest performer".
The problem for us, the porn consumer, is that she's now gone from the fresh enthusiastic performer who we can imagine is a normal person, to a fake looking professional, no matter how talented, taking the shit roles because she didn't make the top teir.