Well, I went and looked at that. I don't know if you got beaten up, exactly. There are a lot more variables than just the 20% margin. You could certainly make some money with that percentage, but the amount you could transact at that margin would be limited, at least under the previous government, before they started taking a closer look at you.Hang on, I got beaten up for suggesting a 20% margin for arbitrage was good enough (https://baexpats.org/threads/new-official-exchange-rate-800-pesos-per-dollar.46590/post-441226), and you're making out like a bandit with, what, 7.5%?
This could be an interesting topic for some people (arbitrage, carry, and other investment and risk management ideas in this crazy country), but it should probably be in its own thread.
I think the plazos fijos UVA are very interesting right now (and so do many Argentinos; they're selling like crazy). I did a transfer yesterday, received the pesos today, and immediately put them in a plazo fijo UVA. The rate right now is high enough that over the weekend I'll make up for what I lost by not waiting another day and getting another 22 pesos/dollar from WU.