i think they pay for this through advertising. by clicking certain links, there may be adverts attatched, so they use some of the money from the adverts to pay for the relief of world hunger.

thats my theory, wheter its the genuine case or not i dont know. but if you look at that site, down the right hand side of the site there are adverts. thats how PC is run, with the money from ads.

hope this answers your question

simon