Looks like there's no compelling reason to purchase auto-clicker. Unless @Sector can convince potential users otherwise.
Yes, we're waiting for him.
Auto Clicker collects all your production and bonuses. When you have a free slots, production placed in slots. When all slots are full, every 8 hours auto clicker collects your production and bonuses.
If you will leave your account for some time, like 1 month, you will have all items collected like if you would login every day.
I logged in today, after a while. All slot were full, and the countdown for both mines and bonus was 0. Is it normal?