They have 1,000 spots available.

If selected and confirmed as a host, your exclusive Party Pack will contain:
Shutterfly 20-page 88 hard cover photo book ($29.99 value)
Free 3-month subscription to the ThisLife Standard Plan (up to 25,000 photos and videos) for you and your guests

Party date: Saturday, September 27, 2014
Host spots: 1000