Probably worried that it would break something for a significant number of customers, so they took a cautious approach. That's the problem with any Internet-wide change: you don't always know who will be impacted negatively or how severely. No one wants to make a quick change only to find out some critical system is now broken.
My guess is Google wanted to really give them every opportunity so that most people come to your conclusion instead of "wow! Google is just trying to censor the internet"
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The real question is: why didn't they get booted out earlier?
Probably worried that it would break something for a significant number of customers, so they took a cautious approach. That's the problem with any Internet-wide change: you don't always know who will be impacted negatively or how severely. No one wants to make a quick change only to find out some critical system is now broken.
My guess is Google wanted to really give them every opportunity so that most people come to your conclusion instead of "wow! Google is just trying to censor the internet"