Well, when your license says "free for non-commercial use" ;-)

But otherwise I haven't heard of a license that you paid for with such a restriction.

See item #6 in House's EULA:

http://www.houseind.com/fonts/licensing/eula

Is it 'normal'? I don't know. I think it's more of a rarity.

It’s more common than you might think. The House Industries EULA is the most notorious for this sort of thing (although it happens only with a high price ceiling), but I get the impression it’s becoming more common as type designers start thinking about font licensing as stock licensing. The next version of my EULA will require any company with gross income above a certain (large) amount to have a special license for using a typeface in a logotype.

I think the font industry should do serious designers a favor by requiring a special license for any for-profit logo use to keep commercial fonts out of logo contests :)

Let me know if that's a retroactive change, James...I just used Recovery in a logo. ;)

That's a little draconian. So, I won't be buying any House fonts any time soon. But then with my font budget, that wasn't going to be an issue anyway.

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...from the Fontry