Gokano
from:

Gokano is an website where you can gather points from activities like Daily Logging and completing one short survey per day,and after to exchange them to prizes
You get 1 point for each task.
Admin will announce on Facebook the date of the restock,when you can get prizes for free.
http://gokano.com/ref/vqvIs7e6VB1q
Good luck.

Poster :
DenisHero