What do you mean by multiple of 0.01 BTC ? You want to sell 0.05 BTC credit for what price ?
What I mean is I prefer buyers to buy 0.01, 0.02 or more and not 0.001234 or 0.005
I do not expect people to pay full value for the credits, I see some people are selling them at half price and some are giving them out for free. I believe some advertisers should find them useful, so I am open to offers.