My offer requires 10 RT for 50K miles, then 2 more RT for an additional 10K, then another 2 RT for a final 10K. One-way counts for 1/2 trip. Offer NOT good on NW or any code-shares, but it is good on COPA. Still, don't see how I can make this one. I might not even register, but I'll think about this for awhile...