These type of posts are getting pretty tiresome. Asking if it is even possible to make money from a HTML5 game? Why wouldn't it?
You could easily make an exact clone of many hit games like hotline miami to name one. So it has more to do with the developers here and not the engine. So if someone here came up with and could market such a game then you would have a giant c2 hit game.
There are tons of big companies that makes a fortune out of html5 products. You can make games, banners and websites to make money with C2.
So to say that you can't make a profit out of C2 is just ignorance and lack of experience...
I will happily subscribe for a business license of C3. And like all my softwares C2 is awesome for some things and other engines are good at something else. No engine is perfect for everything.
But in the end. There is no limitation of c2 that makes it impossible to become a millionaire. It just takes a good developer to do it.
And $99 a year is less than a netflix subscribtion for god sake