"Every high school pass out knows this equation. To maximize profit, you can either maximize the profit per device sold or you can maximize the number of devices sold. Profit has the tendency to stay constant. If you reduce the profit per device, the number of devices sold will increase."

What? NO! You maximize profit by finding out where supply and demand meet to find the point where profit and units sold turn out the maximum profit.

And the rest of the article has little to do with maximizing profit and every thing to do with gaining market share.