How many Google Opinion Rewards participants volunteer for panels that validate store visits? By vmartinez How many Google Opinion Rewards participants volunteer for panels that validate store visits? 500,000 1 million 100,000 5 million Related content Related questions:Data from store visits is validated through a panel…When a store visit happens, the data is validated…______ is an opt-in, invitation-only program where…There may be times when you need to make sure all…