All - I am intrigued, as you may be also, in that (based on series of recent posts) Chase seems to be truly doing some "test marketing" with all sorts of variations of this double miles promo such as a) rolling windows of opportunity, b) different target audiences (new cardholders, older cardholders, etc), and even different spend types (double for only drug and groceries, vs double for all purchases, etc).

One the one hand I am impressed to see that Chase is using targeted marketing in such mathematical variations as to hopefully make some valid conclusions.

OTOH - I have been left out of these double miles promos now for several quarters - and I literally put my Continental/Chase card "on the shelf" and have not used it for years due to my dis-inclination to ever purposefully accrue Continental Nonepass miles.