BRICS is not a scam. It is an organisation whose purpose is to facilitate trade between its members and encourage economic growth in a way that maintains independence from the Bretton Woods framework.
As BRICS develops, it will become a fully formed alternative to the US-dominated Bretton Woods system that was formed after WWII, when the US had 58% of the world's industrial capacity and world GDP.
Anyone can understand that such a system forged in the aftermath of WWII should not be valid for today.
BRICS is not a scam. The scam is the petrodollar.