The offer is limited to the first 50,000 miles purchased (which nets you 100,000 miles).
And this time there’s no bonus for transferred miles.
Still, $1478 including tax for 100,000 miles is pretty good — it’s enough for business class from the US to Europe even after US Airways increased the price of that award back on January 6.
Presumably this offer should be stackable with the 25% bonus on gifting miles being offered all year to US Airways elites. (At least I haven’t seen anything to suggest the two offers aren’t combinable, please let me know if otherwise.)