I received a targeted offer for the Delta platinum amex, 25k after 1st use, including 5000 mqms.

10k additional miles after $1000 spend, which includes 5k mqm. For a $150 annual fee.

(That's 10,000 mqm)

If you combine this with the membership rewards mqm promotion, you'd get 35k mqm.

If you get the delta reserve amex for $450, you get another 10k mqm after 1st use, putting you at 45k mqm.

You can make mid tier status without flying, and you can add to that status by using the amex built-in miles boosts.

You can also use Delta's pay with miles feature, to purchase a refundable ticket, and have that refunded to you in the form of a Delta e-certificate, thus allowing you to redeem skypesos for revenue flights that earn miles and status.