mph88888 - 1:51 pm on Jul 30, 2004 (gmt 0)

That's exactly what I mean. For example, the first million page views might be £1/1000 PV, but at 20 million, it might cost 15p/1000 PV. The price-per-page-view really should reduce by a factor of X for each million page view increase then eventually flatten out at Xp/1000 PV. I suppose the curve depends on how the vendor system is set-up and how their cost structure changes with higher volumes. Most importantly, it will depend on what the vendor can get away with!