The more people who buy a product doesn't influence the price directly. The higher the aggregate demand of a good, the more influence they have on making the sellers provide that good at a lower aggregate supply. (i.e. more products at each price level, this in turn lowers the equilibrium price of the good. Therefore causing the price to "become cheaper" which allows more people to buy it.
Sometimes this is at no cost to the supplier because the demand curve is more elastic then the price of the inputs, which means they can sell more at a lower price and still make more revenue. Sometimes the supplier needs another incentive to make this a positive experience for themselves, whether through a technological innovation, or government subsidy, or lowering of the quality of the good.
In this case, because more people want the good, and because the demand curve is more elastic then the price of the inputs of the good, all Crucial has to do is ramp up production by adding more workers/ more factories, and because quantity sold increases faster then the price decrease, their total revenue is larger.
Yes: This is off topic slightly...
Who said I would disagree with this?
But the basics is that the more people buy these, the better. Also competition comes into play and Crucial (and the other manufacturers) are trying to remove each other from the equation. It's a fresh market.