Unlike most commission-free apps, Public does not engage in Payment For Order Flow (PFOF). \r PFOF is a common, but controversial practice where the broker receives a rebate/cash incentive from a market maker in exchange for letting them execute your trade.\r PFOF creates a conflict of interest since the broker's duty is to get you the best execution. Because Public does not do this, they have an optional "tipping" feature that members can use when making a trade.[8]