"Currently, Down does not sell or share your data with third parties for marketing or advertisement purposes. However, we may elect to participate in interest-based advertising and direct marketing campaigns where we use third party companies to serve you targeted advertisements and marketing campaigns based on you're the data we collect from you."
While Down claims not to currently sell data, they explicitly reserve the right to begin interest-based advertising and sharing data with third-party ad companies at any time, with only an opt-out mechanism rather than opt-in consent.