Interesting screenshot, a few questions:
Does the account also hold large amounts of gold foil cards?
Are you sure they earned all of these from botting? Or did they maybe buy some of them?
How many other botter accounts hold similar numbers of cards? It can't be very many, since this account has over 2% of the total supply of some of those cards.

Although that is a lot of cards, it's actually only enough to "surf" on 425 land plots at max level. And that's only if they don't sell or burn any of them to get the 21.25 Million DEC they will need to stake on the land.