Insane... If the fare does in fact allow a stopover in each direction!
With a couple of 1 way J awards to/from Europe, this could be used to put together 2 EU vacations and a south American vacation for someone in or near an AA gateway.
related with the below fare the cheapest I found is ~$2600 return AI from AMS to GIG/GRU
also avail at ~2800-3000 from several places to europe to GIG/GRU/SCL/EZE/MVD
the fare allow 1 stopover in each direction and combinations with AA/LAN/TAM within N.A and S.A so it is a great deal.