Your country: US
Reward types: Cash
Incentives per survey: 1 to 3 US$
Cash out: from 5 US$
Number of invites: about 8 in a month
Age to join: from 15 years
Prize draws: Monthly high technical devices (e.g. iPhone, iPod or Apple TV) with a total retail value of 500 US$
Comments: Payments checks are mailed weekly

Your country: US
Reward types: Cash
Incentives per survey: 0,50 to 3 US$
Cash out: from 20 US$
Number of invites: about 15 surveys in a month
Age to join: from 18 years
Prize draws: New membership prize draw for 2,500 US$ and monthly prize draws
Comments: Get free products to test at home

Your country: US
Reward types: Gift vouchers and sweepstakes
Incentives per survey: 10 to 100 points (up to 1 US$, more loyalty points possible)
Cash out: from 500 points (5 US$)
Number of invites: about 8 surveys in a month
Age to join: from 18 years
Prize draws: New membership prize draw for 5,000 US$ and annual car prize draw (e.g. Ford Fusion) and monthly 5,000 US$ cash draw and quarterly to win 2,500 points each
Comments: Loyalty program from 5 participations in surveys, in addition extra points for frequent partaking

Your country: US
Reward types: money, gift cards and items
Cash out: Amazon gift card for a value of $5
No. of invites: continuously throughout installed software
Age to join: from 18 years with all devices
Comments: Amazon gift card of $5 if kept as an active member for only a week, additional credits every week, which can be redeemed for more gift cards from Amazon, your participation (for at least 90 days) will also be recognized with donating a tree.