With the "After 4 flights, you'll earn triple award miles" offer, I may need to find a cheap first-class round trip flight somewhere to push me over the 4-flight restriction so I get the 3X miles for my already-booked trip to Europe.

I was just commenting the other day I missed the old USAirways Dividend Miles promotions like the ones where you got more miles the more geographic zones or new destinations you flew to and that really encouraged mileage runs.