Jaap mentioned the pools legacy faucet is a little hard to understand, but I want to point out, the 'cpid faucet' is also the difference between receiving 100-900 bbp in contrast to receiving 1 bbp (from the plain vanilla faucets).  So I think the incoming podc researcher will 'get it' if we add more docs for it.  

I will work on porting the faucet to web.biblepay.org - adding to my todo list now.