Oh come on...the reason for the change is transparently obvious (if indeed it's not a typo). She's just signed a contract with Digital Playground, so they need her to change her name so that they can exclusively copyright it, which means you'll have to put a little 'tm' after her name every time you type it, just like they do with Jesse Jane's name.

Katsumi = Katsuni
Tara Patrick = Tera Patrick
Natalia Cruz = Sophia Santi
Digital Playground = Too Corporate To Jerk Over

You know it makes sense...