I also got this, am currently EK Silver and a Marriott Ambassador. I have been sending perhaps 50 nights of stays via the account connection double dip (since I hit EK Silver) so they can clearly see I've spent USD10k+ at Marriott in the past six months. The offer is probably not that interesting for me as I already have status in other airline programmes and I'd already made a decision previously to stay at Silver (purely for the double dipping on miles/points) rather than go for Gold which had almost no benefits for me. I registered though

And don't worry DYKWIA , I won't be unnecessarily filling your lounges, I don't travel EK anything less than business class anyway :P