About 9 years ago when they started development of the BE-4. Up until then Blue Origin was mainly a think tank and research project.

I've been quite dismissive of Blue Origin in the past, their pace of development seemed so sluggish compared to SpaceX, but I think that was somewhat unfair. It seems Bezos only really started pouring money into the project a few years ago though. BE-34 does seem to be behind schedule, or at least the launch vehicles are by a year or two, but that's par for the course for big rockets.

Well, it a money burning venture, by making amazon bigger and bigger he is contributing to blue origin.

He funds blue origin with more than a billion $ every year from the sales of his own amazon stock. Without amazon filling his pockets he can't finance blue origin.

He puts more of his money in blue origin every year than the amount amazon will pay for zoox

What do you mean? Prior to COVID I thought Bezos had his full attention on Blue Origin