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jtara - 8:14 pm on Jan 25, 2008 (gmt 0)
So, they are going to insure that domains in the AFD program have actually been paid for and aren't being "kited". The purpose of "domain tasting" is to be able to measure traffic. Not to monetize the domain without paying for the domain. Google is probably doing this because they may sense there are lawsuits coming over misuse of domain tasting, and they'd rather not be a party to them.
5 days, because that's the typical tasting period. After 5 days, you have to actually pay for the domain.