The Reklaim app rewards you for your data. Get a "weekly paycheck" just for having it installed on your device. Also earn through polls. Get 100 points/friend you refer and 10% of their weekly data earnings. Cashout to Paypal, gift cards, or charities at 1000 points.
I've been a member of Survey Savvy for about 20 years. They are a one of the most reputable survey companies around. In additon to taking surveys, you can install the SavvyConnect app/extension and earn $3/month per device.