Benefit of Supplemental BCAA's

What is the benefit from supplemental BCAAs if you are already getting in a couple or more servings of protein powder per day if the powder has BCAAs already in them?

Check out this article;

http://www.t-nation.com/readTopic.do?id=1123403

It describes how most of the Testosterone Nation authors use BCAA’s.

And most of them will benefit from the sale of their bcaa’s.