Jeff Bezos
Considering his very public status as the world's biggest billionaire, Jeff Bezos might just be the most in-demand gala guest in the world. But we wouldn't get too excited if he RSVPs to your fundraiser. At the recent Baby 2 Baby event in West Hollywood, the Amazon Founder reportedly earned "groans" from the crowd of celebrity attendees when he only coughed up $500,000 for the cause. Sure, a half a million sounds like a decent amount - until you remember he makes around $142,667 per minute.
And this isn't the first time Bezos has been cheap on the charity front. After last year's Australian Bushfires, dude donated less for relief efforts than Kylie Jenner.