Or you know, you could raise the price of your sketches accordingly, or start watermarking your sketches in such a way that it absolutely fucks with the AI and renders it not useable (why the fuck are you giving out previews without a massive watermark is beyond me), or start selling "full AI finish" pieces cheaper than your regular ones abusing the advantage of being able to chuck out 20 of these fuckers a day and absolutely corner the market; you could even make it a selling point that you're doing "ethical" use of AI by only training the model on your own art, I'm sure twittards would love that.
But I guess when you're a low IQ retard you don't adapt, you die.
Nothing of value lost in any case, it's another generic anime 'artist', the era of mediocre fuckwads selling their smut for money is soon to be over and I'm all here for it.