No, but it's not like they are privately emailing me with their complaints. They drum up threads in the subreddit and rally others to complain as if they are being personally wronged.

I suppose I could offer a refund, but refunding a $5 donation is just another example of how a donation box is a waste of time.

In the future I would at least consider a Patreon system where donations renew every month since server and development costs certainly do. Way too many people think they're buying an annuity against your free time with a one time donation/purchase.