A sensible use of your time.
If your boss is happy that they are getting their money's worth from you, what you do in the rest of your time is your business. Brain surgeon. Register commenter. Stripper.
Those mentioned in the article appear to have been scamming their employers doing two half-jobs for two full wages, and deserved to be fired. And checked for tax evasion.
The reddit poster who automated their job should have kept quiet. If their boss finds out, they can just get someone to write their own script and fire him/her.