Can Treehouse just buy out every other learning website, already???

Agreed. After my first bout with Treehouse, I tried a couple other places, but then realized everything I knew about code was from Treehouse and I was just getting extra practice with the basics on some of the other platforms. I don't know what it is (okay, I kinda do), but Treehouse just has the best platform for me to learn, even though other places may have more advanced topics - at least Treehouse is always expanding!

There's a tradeoff. treehouse courses are interactive, organised and include bells and whistles like animation. But this comes with having a lesser range and hitting the higher value targets (broad, often introductory courses on common tech). Udacity has a decent quality of course, but in some cases, this might be a function of google (or other companies) donating resources to produce an interactive course for some pet technology that's very much in their interest. Course quality and range is very much a function of how companies plan to make money. I haven't looked at the finances, but i'd assume some education providers may have low margins or may still be in the expansion stage (rather than the full mature viability stage). I think lynda is owned by linkedIn, and pluralsight has had investment to tunes of hundreds of millions and has a substantial valuation. Some of the smaller players i think are additionally already owned by the major players. Treehouse doesn't seem to have nearly the same money as pluralsight or lynda. So my considered opinion is that treehouse do well given the landscape (and if you find a few billion dollars in your jean pocket, do invest). (i keep my treehouse subscription, and have used udacity, lynda, MVA, pluralsight, and others.)

I know what you're saying, Treehouse is my main source too, but practically speaking, monopolies are bad for the consumer

Thanks for the compliments Andrew Folts ! I'm glad you like our teaching style.