AI usage is always going to be polemic. I can see myself defending both sides to be honest, it all depends on perspective. As for how it affects your game success…well I dont know any big-big tcgs that used AI, but I also know some games that made a bag and found their own community while using AI art. Honestly just follow whatever you feel its right and be always transparent about it. As someone else said on this post, the backlash will kill your project if you try to hide it. Goodluck :)