[davidhalter]

I haven't considered it up to this point. This sounds interesting. What commercial license would you propose?

[jamwil]

I'm definitely not qualified to offer an informed opinion on a specific license, but there are a variety to choose from under the general heading of Source-available Licenses. There are definitely tradeoffs so it may not make sense for you, but it might open up some portion of the market that might not consider a black box.