Sorry to say, i don't think eny want to developer it for free, i'm self pretty good developer and working many year in Software Developer companys and i have study this area to.
there are lots of stuff the developer need to know before developering a site like faucetbox.com you need to know somthing about server adminiastion and how the wallets working for every currency you want to delivery in the system.
when you get a head and know that, you need to have a developer there can build your own JSON or RESTfull API to the system, you need also need to know about trasaction database to becure nothing go worng in the database.
and last last point, you need to build the frontend + backend system.
so if you don't want to spend money on this project i think its will be pretty hard to find a developer there want to help you, becures no bordy know you.
hope you can use my infomartion