Safe nights at a domestic violence shelter

And what you'd be raising is concrete: $50 per bed-night, 400 nights covered when the goal lands — 400 safe nights for women and kids.

Right now the app runs this Rally, and the organizer's share tips back to the cause. Claim the bounty and it becomes yours: Ally helps you rally people to it, and you earn 10% of everything raised — up to $3,640. Take your earnings as cash any time, or donate them back to the cause — every $5 you give earns a ticket, same as anyone. The clock's running — when it hits zero, the house takes it, and holds it until someone buys the seat with a $50 gift.