Cash money says there’s already a native competitor just waiting to get that money

There isn't and probably won't be. At least not one with a library even half a size to that of spotify. People will probably flock to some competition like apple music or youtube music (neither of those services, as they are not very popular, seem to have said anything about this copyright law amendment). Also a senator already pointed out that if you have a valid argentinian credit card (there's one very easy to get here), you can just register as an argentinian and pay less than a dollar instead of the seven dollars it costs here as a turnaround.