That's the problem of the ai generated images, they mess sometims with more hands legs or finger, it could be edited, but I don't have wish to do it now. They're getting better they already solving this problem.
This question is a bit borderline even if none in the history of Steam has been banned for farming cards even with 3rd party programs:
"You may not use Cheats, automation software (bots), mods, hacks, or any other unauthorized third-party software, to modify or automate any Subscription Marketplace process, the process of Steam account creation or otherwise in interacting with or controlling the processes or user interface of Steam, except to the degree expressly permitted."
If you use programs for cheating in multiplayer games you will be banned of course.