Which brings up my question

IIUC, someone can go to a store that sells (legitimately) ms office pro, not the home/student edition, say. Now, said person is running an office at home, or maybe not, and takes it to ones law office or candy store or such, and generates letters, pamphlettes, invoices, and even for-sale books. IIUC, a BUSINESS has to get a special license/permission to do those things.

Is that so? If so, why? Why is that so? Isn't ms' income on that limited to the first sale, and to whatever desired tech support the consumer is willing to pay for? It seems the same with Lotus SmartSuite. Not sure of Corel/Borland back in the old days or now.

Sounds like double-dipping to me.