It just seems kind of odd that everyone is rushing to put up their pictures of their beloved Boston so that the person who chooses the winners can sell calendars for $20 each.
Seems as though a free calendar is the least that could be offered since splitting the "profit" isn't very likely.
Edit: At $8.46 per calendar (for 20-50), you pre-sell 20 calendars and that gives you $400. That is enough money to buy 47.28 calendars. That leaves you 27 calendars to give to the 12 or 13 winners, and then sell the rest. You've now made $300 off our pictures and our animals. And gosh, we're just asking for a calendar.