I like this idea, but the devil is in the details. "profit" is less defined than revenue. You have to specify your accounting principles. What counts as an expense that deducts from revenue to help define profit?

It's not impossible, but there's a lot more variance depending on locality, business structure, etc. than there is with just "revenue".

Of course, I suspect it all comes down to whether the entity offering the license is large enough and well-enough legally armed to force an audit of the organization taking the license. If they're not able to do that, it's all self-reporting anyway.