Places with restricted conversion for regular citizens will also have a discrepancy between the official exchange rate and what people pay on the street. In recent history the difference has been roughly 30% in Venezeula, and 100000% in Zimbabwe. Caveat emptor.

Actually the black market rate right now in Venezuela is even bigger. Around 650%

The official rate is 11.3 Bs/$ (or 6.3 depending on what exchange the govt decides you fall under.)

The black market rate today closed at around Bs.85/$

I'm guessing the only way to pay through Stripe with a venezuelan card is one which is approved by the govt to spend their alloted yearly $300.