Google Play Rewards sends you surveys and gives you like 10-20¢ per survey. Each one takes like 5 seconds to complete. I haven’t used it in a long time, but years ago most of the surveys were about shopping habits based on my location history, like “did you go to < store> in the past week? Did you pay with your credit card?” Or random things like “have you shopped for auto parts in the past week? Yes/no/prefer not to answer.”