If possible, I don't think using someone's popularity will be of great help for your community. For newbies that don't know about crypto business, it will be like deceiving them even if you have disclaimer. Some will not read such disclaimer. Also, have you reached out to those listed charities in your whitepaper about your possible collaboration with them in the future. Because if not, this is just another deception as you are listing charities without their knowledge. It is a premature claim.