You're right, it definitely has to do with the IBAMA regulation, which sometimes is really strange, and I absolutely get the point on reduce the illegal traffic, and it surely does its part, but I'm unsure if that is enough.
And there are always some black sheep that sell illegally caught animals as captive bred ones, there are several cases of macaws and amazones, never heard that this is also the case of the red-fronted, but there's definitely a possibility. And that's exactly why I think we need to increase the number of (legal) breeders, a thing that doesn't happens for years.