It does this by finding all sites running under one Adsense-Account that is the same Adsense-Account of a site you specify.

Well, this is nothing special to do, and after getting the idea from Stefan last October I’m capturing GAS,YPN,AMZN and other affiliate ids as specified by AdsSpy myself in my historical SEO database…

The big advantage of this top-pay service is their HUGE index which is said to be fed from the SeoDigger database. A promising big index of 60 million pages or so… enough to capture all the average MFA sites…

It’s a nice service to reveal your competitor’s sites… and if you’re into MI6 work on a daily basis, that fee probably pays for itself… For myself I’m happy to watch all those dozens of sites a competitor APPEARS to have and let my own tool tell me their related in the next second… and – I might still increase my “own” index to capture five times more also to get from 12 million pages to 60 million pages that SeoDigger has

PS: something bit sneaky – they modify the domaintools WHOIS output with a “buy link” to their AdsSpy site if they discover a whois lookup
for a site they find to have competitive information about themselves hehe – domaintools watch out – those Russian’s are at least as smart as you are…