Motion isn't flying anywhere near 100,000 miles a month. He accumulates frequent flier miles with his credit card spending, hotel stays, car rental, and buying things that give miles for the purchase, in addition to actually flying. And since he's an elite he gets several FF miles for every actual mile flown. If you have a Delta co-branded AMEX card you get more than a mile per dollar spent on Delta flights or products and anywhere between one and ten cents a dollar for buying other stuff, depending on the specials they're running. And if you have a Delta Reserve AMEX or a Delta Platinum AMEX (as opposed to the regular AMEX Platinum card) you get extra bonuses that go toward earning you elite status on the airline.
I don't travel much any more, but the last few years I travelled a lot and I can tell you there is a vast difference between being a regular kettle (an unsophisticated traveler as in Ma and Pa Kettle of old time TV fame) and being an Elite traveler. It's like night and day - special phone lines, jumping the security line and bypassing the regular metal detectors, free access to Economy Comfort and exit rows, preferential seating, no baggage fees, free same day flight changes, and the opportunity for upgrades on a space-available basis.
Delta really doesn't care about the casual traveler. They make about 75% of their revenue from about 10% of their fliers, and they make almost all their profit from that group. They're called High Value Customers. Everyone else is just overhead.
Aeroplan has different problems. The biggest one is that it's the worst program in the western world.
Aeroplan Voted Worst Frequent Flyer Program In Online Survey
Aeroplan is notorious for having a high fuel surcharge on Air Canada and Lufthansa redemptions. But, within the Star Alliance you have access to United Airlines, US Airways, and Turkish Airlines that have no extra fuel surcharge.
So just spend your Aeroplan miles on US Air or United Airlines and you'll be better off.