Update: a few weeks ago I wrote my online application was not approved instantly. Have not heard from anybody since then until about 10 days ago when I saw a box at my door. Inside the box there was a package, inside the package -- the card. The heave duty one...

So, should I expect to receive a separate card to use for entrance to United lounges at airport or is the actual credit card that will get me in? There is no UA MP number anywhere to be found on the credit card.