Microsoft security bulletins using software “not licensed for commercial use”

I can’t help noticing that in the last couple of weeks, Microsoft’s security bulletin emails have been sent as PGP signed messages using a copy of PGP Desktop that is “not licensed for commercial use”.

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This newsletter was sent by:
Microsoft Corporation
1 Microsoft Way
Redmond, Washington, USA
98052


-----BEGIN PGP SIGNATURE-----
Version: PGP Desktop 10.2.0 (Build 1950) - not licensed for commercial use: www.pgp.com
Charset: utf-8

wsFVAwUBURwisxWqSyu+jsPhAQjyGQ//fj/k7Fb2zIr2gcINPs66n3SAEdNp41eO
mvTuT/knbPdZNhECQaFcQulaTgOgUDMCIVPT+NWTWBBuoqaXUuMhPKMaro6Bv0Be
...

I suppose a small struggling startup company like Microsoft can be excused for not paying to update keep their commercial licence up to date.