Yeah, the point is it's going to be rampant the over charging because people hear "tourist dollar" and they think it should correspond to the original tourist dollar where Argentines pay more abroad. So the equivalent intuituve Argentine logic would be foreigners paying more in Argentina! Lol. They don't understand the core motivation of banking USD by giving foreigners a better rate for using cards.
As for my situation, I was trying to pay in cash pesos at the rate agreed when I booked. They doubled the price by calculating their dollar rate at MEP. It was a $650 USD stay that should have been $107,000 pesos + 21% IVA as quoted by booking and they wanted $230,000 pesos in pesos cash.
I booked with AMEX to dispute charge and have a reply from Booking that agreed to an overcharge so I'll get it all back to their detriment. Whatever, the point is chaos, as always.