[citation][nom]anti-painkilla[/nom]Free to download, and for the most part, between skype users yes. But it may not always stay that way, and with an open source alternative it may force skype to stay 'free'.Also there are other reasons for it, he may want to help people understand how a program like this works, so they can get jobs at skype.[/citation]
Charging for general skype use would be about as dumb as AOL charging for AIM (Perhaps the only good AOL product they ever made). The idea is to make a rich eco-system which can be a big selling point for MS products. Skype could be added to Outlook, or tied only to PW7/8, or at least charge competing phones an arm and a leg to have skype available for their mobile devices. In short there are lots of ways to make good money by keeping it free to the public.
My only hope is that they would make the silly program easier to close. I hate that it wants to be on all the time!