The bot tracks Musk’s jet using publicly available data, but the tech billionaire has not been amused.

Musk offered Sweeney $5,000 to take down the Twitter account,according to Protocol.

But Sweeney refused, saying $5,000 wasn’t enough for the satisfaction he received from his work.

Now Sweeney is looking to turn his hobby into a business by tracking other well-known billionaires.

Sweeney is currently selling T-shirts, stickers and hoodies featuring Musk and an airplane on the Ground Control website.

Sweeney also created bots thattrack the private jets of billionaires Bill GatesandJeff Bezos.

Musk’s company Tesla didn’t immediately respond to a request for comment.