Let me provide accurate, real-world examples:
- 1 USD = 171.276 ARS (according to XE's website, this is the official exchange rate).
- 1 USD = 311.25 ARS (according to Binance's P2P exchange, this is the parallel/black market rate).
In Argentina, most stuff is valued in USD, even if the legal tender is ARS. If you were to buy a $2500 ARS burger with Binance money, that burger costs you $8.03 USD. If you were to buy that same exact burger with a licensed properly regulated exchange, that burger costs you $14.59 USD, almost the double.
This might seem like a trivial example, and a few dollars don't seem to make much of a difference. Try the same example with your weekly grocery store basket, rental apartments, payments of a car, etc. It all adds up and most people here don't earn more than $300 USD monthly (valued in black market exchange rate, of course).
Plus, Argentina and Venezuela are heavily taxed.
EDIT: Formatting of the example.