Doesn’t sounds trustworthyany bank in specific like a lot of them do that
They do but holding the ARS through Argentina banks...
Actually such schemes works like:
You are paid in an account that the Uruguay banks have in Argentina.
Like most people don't want ARS, there are exchanged for USD using the free market price (dolar BROU) to another guy in need of ARS with an account in the same bank or even in another one