Microsoft Spent Millions On IPv4 Addresses

I was reading on the net today (more info here) that Microsoft have just purchased 470,016 IP version 4 addresses.  Microsoft has had these addresses from defunct telecommunications firm Nortel via a auction according to news reports.  What Microsoft plans to do with them is not yet known.  But in there eyes this will be a good buy, as reported already (info here) the world has almost ran out of IPv4 addresses.