AdSense Earnings from a Site that does not have AdSense code anymore?

How could that be possible?

[Sobriquet]

I had pulled out AdSense code from one of my sites, that was not performing well, about ten days ago.

Today, i was a very minor earning from that site ( as per channel data information ). It had two page impressions and 4 clicks with a few cents.

I see two possibilities here.

1) The site could have been in cache of some users computer or proxy isp, alongwith adsense code.

2) It could have been a click dump from the past.

What do you all think this could be? Has anyone experienced this before?

[Ehanson]

I'm experiencing it right now.

I had to put a website out of its misery four days ago and was shocked to see my impressions shot up only a few hours later; I'm guessing it is from the few visitors going to the cache pages.

I'm still getting impressions from the ad units. Maybe there was demand for my content after all...

[jomaxx]

Third possibility is the occasional user going to the Google cache, Yahoo cache or the Web Archive cache. There are a couple of others but those are the main ones.