There is nothing else we can possibly tangibly offer, and you are right to have high standards. Note that also we never say a version of "dude trust me", but lay down the facts how the business operates, what the vision is and why are we doing it.
The best we can do really is have a business model that aligns incentives with the users and weirdly enough, this is already an innovation in this market. Then, create the best possible product that users will love. Gaining trust is a process that can not be skipped.
Accepting crypto payments could be a solution but I'd totally get why'd you want to avoid that.