I think I disagree with this. It is hard for me to imagine that if everyone running BOINC tried to directly buy GRC every month, instead of paying their electricity bill, the price would not go up. No matter how volatile a market, the price is still determined by supply and demand.
The point about a whale selling is interesting, but I don't think it changes the argument. If a whale sells and the price drops, then we simply continue with our monthly purchases until the price is high enough to switch back to crunching BOINC.