alt Hacker NewsMIT license + a standard rate.
Something like " If you require customizations or enhancements we bill at 1000$ an hour, 8 hour minimum."
I don't particularly care if someone working at Microsoft or whatever sees my open source project and decides to use it. That's fantastic. But I'm absolutely not going to work for Microsoft for free, so they need something for one of their use cases they need to pay up.
This is pretty much what Richard Stallman did. He acted as a consultant on GCC for organizations/businesses and charged $250/hr in 1990s dollars for the privilege of his time and expertise. If Mr. Free Software himself put a monetary price on his brainpower, why don't you?