I would ask if there would be an agreement on sharing the property. Say you donate 50% and they give up wearing the belt, would you be allowed to keep the belt since you paid for half the value? What would be the responsibility of the person who chipped in? Would they be keyholders? Would they be wearers? I wouldn't want to support random strangers unless I know exactly what that money is going to be used for. When I do decide to donate, there needs to be a commitment of how that money is used, and it needs to be used as promise. As for strangers online, I would decline to offer anything unless we are friends in real life. Being friends for me, means hanging out every once in a while, not just talking online or phone calls.
Short answer: No, no guarantee of money being used as promised.