I'm not a member, but just got a mailer from them today. $10 gift card for Gander Mountain inside, no strings attached. If you pay $30 to become an associate member of PF before December 20th, they'll send you another $20 Gander Mountain gift card.
Depending on your point of view, that's either join PF, and get $30 in Gander cards, or spend $30 at Gander, and get a free PF membership. Either way, it's a no brainer.