Not among those of us who abide by Google's TOS.
In any case, this thread isn't about whether any given memeber's EPC is up or down; it's about the possible causes of the "EPC collapse" that some members have experienced. I'm inclined to think that two likely causes (aside from smart pricing) are:
- Separate bidding for the search and content networks, which was introduced in 2006, and how advertisers have learned to exploit this new option over the past year;
- Fewer high-paying ads per publisher, on the average, due to expansion of Google's content and search networks that may have outstripped growth in advertiser budgets.
More recently, Google's introduction of an unlimited domain filter for advertisers may have been a contributing factor in some (not all) cases of "EPC collapse."