"While all registered members are invited to take advantage of Influenster Deals, active members “play the game” by unlocking badges that reflect their lifestyles, expertise and power to influence. By earning badges that tell us more about you, Influensters can qualify for VoxBoxes (complimentary packages of products to test & review), rewards (bonus giveaways/discounts) and other special promotions targeted toward our most active and influential members!"
Sounds like with some work you could "earn" the freebie boxes. There doesn't seem to be much on the page yet though - the deals all say "coming soon".
If you sign up, let us know if you have any luck with it.