Tried to buy keyg at its 90% off sales price but no matter what payment method I choose I keep getting a "Due to processing fees the minimum amount is 100 cents."

I'm trying to figure out if there is any way around this, and if not then why can you list a game at a price below $1 if it isn't actually possible for it to be bought at said price?

I believe this is a recent thing. It might have something to with bundles (i.e. someone could bundle 4 games together to be more than a dollar even if each individual game was $0.30 or something).

But I mean c'mon, if the game's worth 49 cents then it's worth a dollar.