And actually, Rob Lowe didn't even get his card, which most call the McGold Card because why not, because he was famous. Instead, he got it because his friend's dad, Herb Peterson, actually invented the McMuffin, a feat for which the rest of us are very thankful.
Oddly, there's quite a bit of politics involved as far as how one obtains one of these mythical cards and how they can be used.
As stated by Business Insider, the cards are not given out by the corporate office. Instead, they're given out (extremely rarely) by specific franchises to be used only at those franchises. In the case of Buffet, however, he can only use his in Omaha. Gates can use his card anywhere he wants globally because he's Bill Damn Gates.
If you're lucky enough to have one of these, you can save yourself a few bucks if you ever want to stop for a quick lunch at America's favorite fast food joint. The irony here is that mostly rich people get them.
You know, of all the perks that come with being a celebrity, this might be the best one. Now I have to figure out how to get famous so I can get my own card.