I think they just charge for the ad's display. So, each time the ad pops up, the company gets charged for the advertsiing space. I think because it's such a good cause, it's worked out a little differently, because if they had to wait for people to click like they usually do, then there'd not be much donated!!!
We should organise a big GG.rog freerice thing somehow. Like, have a big competition, or like a spelling bee type thing. Something like that, cuz that wouldn't cost any of us anything!!
Oh, as an added note:
$25000 is a lot of money, one of the ways they make it up is by selling those little rubbber bracelets. I know last time I mentioned it, everyone said they didn't like merchandise, but they'r easy. They cost next to nothing, you order them from a company online alreadymade. They cost US$5 per bracelet, for postage and handling as well.
It means peopel will have something to remind them of their donation and what they're doing for the world.
It's also a way of getting the word out. People have often looked at my bracelets, and asked what they're for, and been itnerested in the cause. So that might happen with the GG.org bracelets!!!