Fast forward to last week-end and it was ACN's San Jose training event taking place. I got tweeted a video showing Redman doing some sort of motivational speech in front of the whole crowd and now I have no other choice but to realize he is indeed involved in this company. Here is the short video (the sound quality is low) :
To me it still looks like an endorsement. If you look at his Facebook and Twitter pages, there are no mentions whatsoever of ACN or any sort of opportunity. Why's that? When people are involved in ACN, the first thing you will see them do is promote the business to their friends and family through social media. I think the simple answer is that, since it's an endorsement, Redman will do everything he can to hype the crowd, as he would at a rap concert, but outside those walls he's not involved at all in the business and has no reason to share it with his fans and people following him.
As an example of why having big names is important to ACN, here is a Facebook post from a rep using this as a way to prove the legitimacy of his "business". This is how these endorsements are used and why you shouldn't always believe what you might be told.