Prizes are open to all participating, donatable nonprofits. Nonprofits can win only one of the four Grand Prizes available. And winners of a Grand Prize can win no more than one other of the available cash prizes. All prizes, unless otherwise stated, are for fundraising and social media activities taking place on Thursday, May 13. All prize winners will be announced no later than Tuesday, May 18. Prizes, number of prizes and prize amounts are subject to change through May 12.