The Justice Department warned Elon Musk that his $1 million giveaway could come with a prison sentence—and it appears he’s actually paying attention.

After receiving a warning from the Justice Department, Elon Musk has stopped his $1 million giveaway to swing voters from his super PAC.

The tech CEO pledged Saturday to give away the hefty sum each day to one registered voter in a battleground state who signed America PAC’s pro–First and Second Amendment pledge. Every day since then, a winner has been announced: three Pennsylvania voters and one North Carolina voter.

However, the move immediately raised legal questions, as it’s a federal crime to pay someone to register to vote, punishable by a fine of $10,000, five years in prison, or both. Experts were divided, with Musk’s plan falling into a legal gray area at best. Pennsylvania Governor Josh Shapiro called the move “deeply concerning,” and author Stephen King accused Musk of “paying to register Republicans.”