Now you can append affiliate link with "&frame" parameter to show the state of the advertising campaign and to allow visitors to submit their bitcoin addresses (thus becoming affiliates too).
Example: http://btcurl.com/?url=http://btcurl.com&frame&partner=13KnzC8XRLu5DDca3shPnZDsU8EpqmcEJQ
(or colored version: http://btcurl.com/?url=http://btcurl.com&frame=ffa&partner=13KnzC8XRLu5DDca3shPnZDsU8EpqmcEJQ)
Pay for attracted affiliates via
http://btcrelay.com?url=http://btcurl.com/visitors/unpaid?url=
If you specify withdrawal interval upon paylist creation then your visitors will see how much will be paid out and when. Otherwise they will see when the last payout was done.
Hour-based reports in CSV-format are available too:
http://btcurl.com/visitors/last//hours?url=
http://btcurl.com/affiliates/last//hours?url=
(updated OP)