The requirement that most nonprofits use for membership is a minimum donation. This is a straightforward and easy-to-check requirement, and ensures that each member is a single individual (as opposed to one person creating multiple membership accounts in order to have multiple votes).

These fees also go to help support the OTW—to pay for our operating costs for both the organization and for all of our projects, so that we do not need to use advertising or charge fees to users. We intend to keep our minimum donation low in order to ensure that it is not a barrier to entry for anyone who cares about the organization, but we hope that most members will give more if they can!