[jointpdf]

Jeff Bezos owns 55.55M shares of Amazon stock (https://www.secform4.com/insider-trading/1043298.htm). Since just April 1st, the value of that stock has increased by ~55.55M*($2400 - $1900) = $27.775B. I know net_worth != cash, but he can and routinely does (see link above) liquidate stock to fund other projects.

In this context, I think $700M is equivalent to a coin tossed in a fountain.

[SpicyLemonZest]

That's fair. This cashflow is obviously not available to Amazon directly, but I could see an argument that Jeff Bezos specifically ought to make more funds available. (Maybe he will - if you believe the headlines he was entirely hands-off the retail business until recently.)