There is no secret that you can earn Delta Gold status and all the benefits, like complimentary upgrades, by simply meeting required spending on the Delta Reserve Credit Card from American Express. But I just learned the best available offer comes with 10,000 Medallion Qualifying Miles (that count towards status) AND 10,000 RDMs (that count towards redeeming miles for flights) by simply obtaining the card and making your first purchase.
See airline credit card offers page for current offers.
UPDATE: If you cannot see the offer in THIS LINK, try clearing your internet browser history & cache. I initially couldn’t see the offer, but after clearing my cache I was able to see the increased mileage amount as illustrated in the picture below. This will help to ensure you see the offer with increased 10,000 RDMs after first purchase. Expired
Delta Reserve Credit Card Earns 10,000 MQMs – expired
The extra 10,000 RDM SkyMiles is worth a conservative $100 if you value Delta SkyMiles at atleast $0.01 per mile. So in my view, this offsets the annual fee by $100 in value obtained through the card.
I will update my airline credit card offers page to reflect this latest offer with increased mileage. See this page for the current offers.