Its not worth your time. If it was completely hands off and passive income it would be worth it. But the value of each coin is reduculously low ($0.00045). Doing 15 min surveys for 840 coins each would net you $1.5/hr. If you get the max. And you almost never get the full amount. Figure out the amount of time it takes you to use the app, see how much coins you get. Do math. That's how much you are making per hour. You almost give them free labor.