You're going to get a deluge of different answers. Basically, the dev releases a bonus episode after every single release, these bonuses are wildly unpopular even amongst his patreons, and they take an obscene amount of time to create. No one knows the true reason as to why Az does this, though I would bet its a mix of laziness, burnout, poor planning, laziness again, and of course (as much as I hate using this term) "milking".
Officially Az said he makes the meaningless bonus episodes because of burnout, but who really knows. All I know is that I wouldnt have as much of a problem with them if they didn't take an astronomical amount of time to create.