No, the servers are up. No downtime planned or unplanned.
>> "TurboActivateError when trying to use ta.check_and_save_pkey(pkey)"
Which error? (all of the errors inherit the TurboActivateError "base class").
My guess: you're trying to enter a new product key and the product is already activated with another product key. But, again, the error actually tells you what is happening.
Also, CheckAndSavePKey() does not contact the servers.