Fair, if it’s going to be good work, they’re going to have to pore through a LOT of writing. By my very rough count the Witnesspedia is around 20,000 words right now.
Things you should specify, though:
Is it for each piece submitted? Or is it for a final piece picked out among submissions, like Grist did? How many final pieces will be there, if so?
PS: At those rates, I’m throwing my hat in the ring as well. -rolls up sleeves- Any limitations on entry, or are we looking for new writers only?