I'd go as far to say it is almost a certainty that Bezos will launch a token of some sort (even if he's just an angel investor) with the aim of it being used as the primary currency on amazon.com.
This makes much more sense than having users pay the transaction fees for currencies like BTC whilst enabling him to accumulate BTC or any other token he wants to take for onboarding into the Amazon token.
That said though, those domain names registered would solely be for defensive purposes.