You're running a business. Working toward the same goal doesn't mean your every interest is aligned. Quite the opposite, actually. You're competing to offer similar value to the same users.
You're working on a noble cause, sure, but consider this: If you look at your post as a competitive service spamming Codecademy's thread to call attention toward your own, all of a sudden the downvotes start to make sense, don't they?
You're working on a noble cause, sure, but consider this: If you look at your post as a competitive service spamming Codecademy's thread to call attention toward your own, all of a sudden the downvotes start to make sense, don't they?