Major companies and web portals. One company, Spil Games, is investing $5,000,000 in HTML5 games in 2014. There's a lot of money going around, and since there aren't a lot of highly polished HTML5 games, even the simple ones fetch high prices.
My dream is to do what you've accomplished. The last few weeks I've been reading your blog, your book, and checking out your games. It's good to hear that it's still possible to claim a piece of the pie! My goal for the next few months is practice, practice, and more practice on creating fun, simple games with high polish. I'm sure you have plenty of fans already, but you can count me as a +1.