Your country: US
Reward types: Cash
Per survey: 3 US$
Cash out: from 3 US$
No. of invites: about 4 surveys in a month
Age to join: from 18 years only
Prize draws: 500 US$ cash prize for each bi-weekly drawing
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: Sweepstakes (to win cash & valuable prizes) only
Number of invites: about 7 surveys in a month
Age to join: from 13 years
Prize draws: Every month 16,500 US$ total in the US and many valuable gifts, also 1,000 US$ prize draws for new members

Your country: US
Reward types: Cash and gift vouchers
Incentives per survey: 0.50 up to 5 US$
Cash out: from 50 US$
Number of invites: about 10 surveys in a month
Age to join: from 14 years
Prize draws: New membership prize draw for 1,000 US$

Your country: US
Reward types: Cash and sweepstakes
Incentives per survey: 1 to 5 US$
Cash out: from 50 US$
Number of invites: about 15 surveys in a month
Age to join: from 18 years
Prize draws: Sweepstakes with cash prizes for 300 US$ daily and 5,000 US$ monthly