I would recommend avoiding bytargentina at all costs. I assume you must have had a good experience but they have a terrible reputation.

I have used them several times and had no problems.

I think it would be more constructive to suggest alternative sites.

I would also advise travellers to be extremely careful using ATM's in BA. My card details were copied whilst using an ATM on Santa Fe. I much prefer to change dollars into pesos at a Cambio.