Actually, no. The percentage we earn from sales is very small and the little money we do earn helps to keep this site up and running. There are various costs associated with running a web site that is ad-free. We have to pay for things like domain name registration, server space rental, site software purchases and upgrades, etc.
Until the books were published these things were paid for by some of the Staff with their personal funds and none of the Staff are paid - we are all volunteers here.