I support this forum totally.

A few numbers: Counting down to the 25th most recently active thread in the Argentina forum, not counting stickies, gives a last post date of November 20. The South America forum has 22 Brazil-related threads (based on titles) posted in since then, plus perhaps a few more that discuss Brazil in their content but don't mention it in their titles. If the Argentina forum is considered active enough to keep - I feel it is, this is not an "either-or" situation - there is direct evidence that a Brazil forum would be comparably active.