Amazon have a colossal amount of cash sat in a variety of banks, investments and probably rainbows. It makes damn good sense to splurge, sorry liquidate, strange and probably slightly dodgy financial instruments into tangible thingies. It also makes sense to diversify your portfolio generally. Amazon also need quite a lot of strategically placed parcels of land for its warehouses, depots and what not.
If I was Amazon, I would be buying land as fast as my grubby little paws could do so, with a healthy nod to debt to value. The beauty of this is when you have shit loads of cash at hand you can grab loads of long term investments like land and win/win and you even tend to find "incentives" from grateful local govt.
In this game if you get bored of buying the usual stuff like London and Texas etc, you can also grab the bits of the Caribbean that the cruise sharks have left behind. Ideal for a party island.
lol etc