Having monitored a great deal of different priced banner adverts on various types of sites I think I have come to the conclusion that buying expensive banner ads on the larger sites does not pay-off. I can honestly say that I have paid the same price on a new small site for a full year and got more out of it than I do paying the same rate on a very relevant and higher traffic site with a bigger ad.
Has anyone had any major success when spending a large sum of cash on a banner on a popular website?