I think this could cause more drama than its worth. Like people putting the tithe at 0 looking like they aren't contributing. People putting a high tithe and later wondering where their gold went to (and they will look at the clan leaders and wonder if they are getting rich off them)
It should stay as personal donation imo, and tbh I'd keep the info for clan leaders only. It can cause people to want to leave the clan rather than feel like they're causing friction with other members. I don't think people should feel they have to give away their gold to stay a member. If you need gold for a banner then thats understandable, or if the gold goes directly to purchasing items off the market to put them in the armoury (and putting it into the lottery doesn't count). Leaders do put time in, but you need to balance it all with keeping a healthy active clan base and tithes might go against that. As I mentioned first, "set at 0" might not be an option realistically
Sharing items is easy now and completely risk free I believe (for the controller of the clan bank anyway). Its more a friendliness thing than something you expect compensation for, imo anyway