I am the author of the article for TPG that the OP referred to. Just so everyone knows, Money Paks are entirely separate from their prepaid card products, both offered by Green Dot corp.
As others have correctly pointed out, there is no way for anyone to be banned from purchasing a Money Pak, any more than you can be banned from buying VR or any other specific product at a retail store.
Of course, the prepaid cards can close your accounts, like Account Now recently did to so many. But the beauty of Green Dot Money Paks (not prepaid cards) is that there are about 200 different prepaid cards offered that are compatible, of which the Green Dot brand prepaid cards are just a handful.
I am glad the OP enjoyed the article, and I hope that this clarifies things.