I'm not sure, because of licensing and stuff.
For me, using AI is the only way to create a game with this much content (200+ unique cards) as a solo dev with zero budget, which allows me to keep the game 100% free and release updates quickly and to generate artwork inspired by popculture.
I do it just for the fun of it and I fear the second I earn money from it and invest money into it, it would become too professional.