I had the delta platinum and earned both 10k bonuses. I then got the reserve and was notified on Sunday that I was receiving 15k bonus miles and 15k MQM. The miles posted but the MQM did not. I found an older post on a different forum that delta limited it to 2, but then I saw a new post that said you could stack.

im on hold to figure it out, but I suspect you folks already know.