100% of the money raised by my gigs go to an official 501c3 charity. I don’t advertise that because there is no way to confirm that to buyers. Fiverr should offer a service where they verify that an account is run by a 501c3 or that their earnings are going to a 501c3 and then allow those gigs to receive a label or certificate that proceeds go there. Buyers would then have confidence knowing what they are supporting and possibly be more inclined to purchase a gig knowing they are accomplishing both receiving their gig and benefiting a charity. Charge for this service if you need to.