I saw this offer as well, and the February offer, but it never even occurred to me that it would include the 25 X on spend. That's a great deal. I'm not going after TR diamond this year after the lounge devaluation, so I was considering going after Mlife Platinum instead. This would have made it a lot easier. Plus I believe TR still has the status match from Mlife Platinum to TR Diamond through December 31.
Please report back on your experience to confirm if they truly pay 75 X on spend.