More than the $6M direct from Microsoft, was them using their influence to acquire more than an order of magnitude more cash from VC funds.

> I realize the last negotiations are not as much fun, but Microsoft will have brough in $86 million for us including Baystar.

> ...

> Microsoft also indicated there was a lot more money out there and they would clearly rather use Baystar "like" entities to help us get signifigantly more money if we want to grow further or do acquisitions

http://www.catb.org/~esr/halloween/halloween10.html

Microsoft was obviously playing a very significant role in their funding, more than would be expected of someone just paying licensing fees.