This has some serious mileage run potential, effectively offering a decent triple-miles promotion to 1P and 1K members. Not status miles, true. But triple miles nonetheless.

Assuming one can pick up a decent V-fare from SFO-LHR, at around $460 or less (easily done with a 15% coupon), that's:

* 10,500 base miles
* 10,500 status miles
* 10,500 "double" miles

Over 30,000 miles (plus online booking bonus, credit card bonus, etc.) for less than 1.5 cents/mile.

Alright, the amateur is done. Experts, take your marks...