Introduction to GrailAds

Hello everyone, For some time my friends and I are trying to build a system (https://www.grailads.com/). Where the user's data remains safe with the user (in his phone where we collect personal data of the user and make a profile and we don't send the data to any server) and still, we can distribute advertisements to them and reward them when they use and see advertisements in other android apps (which partner with us). I would like to know what you think about this idea. I would also like to know if you will be interested in this product.