I think it was just the Law of Unintended Consequences.
The engineer culture of google, trying to practice "don't be evil", originally thought it would just be a nifty feature for their toolbar.
Now that it's clear that it's only being used to violate their terms and conditions, I think they are slowly crippling it, first by destroying the value of the backlinks display with their "random selection", and now by delaying public pr updates.
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