It's not really about pumping the price of STEEM per say, at least not like a pump and dump. It's more like funneling some untapped value back into the price of STEEM over time. The steady stream of SBDs priced over a dollar sold for STEEM (which is then burned) provides constant buy pressure for the coin and should help it hold up better than most, and possibly push it higher over time. There is really no way to know for sure exactly how much it will or will not help unless we try it.