Sadly it worked until users were taught to expect everything for free (see how every single time someone posts something here or on Reddit that costs money, there is at least one post - often more - with free "alternatives" upvoted near the top) and other developers spreading FUD against you if you do not release the code - even if you give your software away for free.

Of course if you are going to receive harassment either way, might as well get paid for it.