Bezos has had aspirations in space for decades, this is nothing new. According to one version of the story which I know was being told to new Amazon employees

Bezos has had aspirations in space for decades, this is nothing new. According to one version of the story which I know was being told to new Amazon employees at one point, Bezos founded Amazon to make money so that he could do space stuff. Not sure I believe it, but that narrative was being tossed around about 15 years ago. Mega constellations are a new focus, obviously inspired by Starlink, but it's entirely rational given the context of Bezos already owning a rocket company. Operating a fleet of communication satellites has been proven as a working strategy for paying for a lot of rocket launches. At this point, any rocket company that doesn't have similar plans in the works is asking to be out of business.