As soon as the situation is reduced from 'Global Pandemic' it becomes 'cost only' for COVAX but everyone else starts paying full price. this can be earliest June 21st this year, I think.
So I think it was a long game - make it popular, make it the vaccine that beat the pandemic, and then everyone will want to use it for the probably annual boosters and the money comes in.
So a good relationship with the big economic blocks should theoretically be important to them.
I'm not convinced. Firstly, who decides when the pandemic is officially over, is it the WHO? And are AZ telling countries, well if your order is delivered after that declaration it may double? triple? in cost? Can they even do that?
And the Sputnik vaccine is apparently suspiciously similar to the AZ one so if AZ up their prices for tweaked booster shots who's to say they won't be undercut by Russia and never actually make much of a profit on this vaccine.
Sadly I can see AZ walking away from vaccine production when all this is over.