Paul Allen is spending his money to do some really interesting stuff.
Should you ever be in the Seattle area, I HIGHLY recommend his Flying Heritage & Combat Armor Museum in Everett WA.
It is a collection of fully restored and functional WW2 aircraft that all sides flew. Yup, I said functional. They all fly regularly, flew in WW2 combat and are restored to end of assembly line condition.
He is now adding combat served armor (tanks and other heavies). The docents and restoring craftsmen are largely retired Boeing workers
And Bill Gates and his spouse are spending their money on abortion, birth control and questionable "vaccination" programs.