A few years ago, this may have been a decent deal, but M&S has been devalued to the point where even DL SkyPesos look attractive. TK was arguably the top airline in Europe not so long ago, but they have been swirling around the toilet recently, with absolutely atrocious customer service to match. I would expect anyone participating in this promo to encounter a lot of red tape and find out after it ends that they didn't qualify for a myriad of BS reasons, assuming they are even given a reason at all. Caveat emptor!