How to spread ppc(eg. neobux) based advertising traffic through a month. So when you buy eg. 10000 clicks you will be delivered around 333 cliks a day but not always the same amount (1.day 371 2.day 324 ...) Traffic needs to be cheap and quality can be very low.
You can set a daily spend cap for your PPC ads on a per site basis or a per ad basis. That basically would do exactly what you are trying to do.