Probably from ads. I just wonder whether those 10k are coming from learn python alone or all 'learn' websites combined. I'm actually developing a Codecademy 'clone' for Brazil and have looked at these sites for reference.
That's super nice, mate! I love teaching and am building a website to teach programming myself. Now, if its ok for you to disclose, how do you manage the evaluation/testing of user submitted code in the backend? Thanks and congratS!
Also how much time it took to reach that point?