Reddit user dmanthey said they inserted each game into their Switch 2 to patch, but found out that their online services were restricted the day after. The Switch 2 user contacted Nintendo support ...

A redditor claims that they were banned on Switch 2 after using Switch cards, leading to speculation Nintendo is checking for dumped cards.

Switch 2 user warns about accidental ban after playing preowned game cards A Switch 2 user claims to have been banned thanks to used Switch 1 cartridges bought off Facebook Marketplace.

Nintendo President Shuntaro Furukawa did not confirm if Game-Key Cards sold poorly, stating it's for the larger sizes of Switch 2 games.