The Fedora project justifies and clarifies its position on the original Beerware License as follows:
The license contains an optional clause where, if the recipient feels that the licensed work is “worth it”, they have the option to purchase the copyright holder a beer. If this were mandatory, it would make this license non-free, but since it is optional, it does not consist of a use restriction.
Given this reasoning, Fedora would certainly take issue with the clear obligation in this license. The extra punch of this unnamed license has led us to refer to it internally as the Stronger Beer License.
Every company has to make its own calls on the risks it’s willing to take and the types of software licenses it’s willing to allow. What are the chances of running into one of the copyright holders in a bar? What are the chances of their pursuing a claim should “you” (whoever that is) not purchase the required pint? But JASidePanels, a UI display controller, shows up in a number of open source and commercial apps, so the question is worth considering. Is this new beerware-type license too strong for your taste?