It's slow process but you do make a bit of money kost of the time it will only give you .11, .25, or .65 cents or $1.00 but every little bit helps, you can make a bit more by keeping your location services on and checking into places you go, start leaving reviews for your checkins and then after you do that a few times you will get more chances to make some change, I also recamend once you recieve your first bit of credits, going into your calander app and jump ahead exactly a year and set up an event to remind you a week before that date so you don't lose any money, funds recieved only last 365 days. Most of the time I redeem once I get around 20-25 dollars, the first year I started using this app I ended up loosing around 46 dollars because I got a new phone didn't reinstall the app right away and by the time I did it was too late. So just a friendly heads up, but at least now Google is kind enough to tell you this right when you first open the app, unlike back in the day when the app had just come around. I have been using this app since around Jan 2014 and have made just under $500.00.
