I don't know, treating her customers like crap is the shtick she's going with, I think. There's dudes into that crap and it appears to be working. She already made over 15k and in her words, "she hasn't done anything crazy, YET". People have to remember she's an actress and she's acting like a dominatrix.
Or her being flippant and disrespectful is how she deals with the fact she went from hunger games to showing her tits on the internet for tips. In her mind she's elevating herself above the people watching her, she thinks treating her customers as less than elevates her as superior to them. She's got to cope somehow. One thing I know for sure, she loves the money from Onlyfans so expect to see much more of her.
And unless she starts to lose money, she's not going to change her behavior towards customers. If I was her I wouldn't either, not if I'm raking in that much cash.