Quoted from Pinzap:
Wait... did you create these?
I basically just used images already in the game as apron card backdrops so as not to create any issues. I personally don't ever sell stuff like that, I just do it to help the community. Was just a bit taken back to read " here is a set I made".
No big deal I guess, but I just didn't like people getting charged for what I would do for free.
If original artists had any issue with those cards I would delete immediately by the way.