There is a one-shot manga for Death Note that was published on Mangaplus, on February 3th, 2020 (you can read the manga officially here.
In the final scene of this one-shot manga, Minoru Tanaka, the new owner of Death Notes, was selling the Death Note through an auction online and it sold for 1 Quadrilion Yen. The person who bought it was the President of the US at that time. The money will be transferred to the account of every person in Japan that has an account registered with Yotsuba Bank of Japan, 1 billion Yen in each account.
When Minoru gave the Death Note back to Ryuk, Ryuk got yelled at by the King of Shinigami, who said it's forbidden to sell Death Notes to humans. So for the first time, the King of Shinigami added a new rule for Death Note usage:
A Human who buys or sells the Death Note in the human world will die. The seller will die when they receive the money and the buyer will die when they receive the Death Note.
This canceled the transaction, but the money was already transferred to every person in Japan that had an account with Yotsuba Bank of Japan. But at the end, Minoru still died when he withdrew the money one month later after he gave up the Death Note's ownership because Ryuk wrote his name in the notebook below Light Yagami's name.
Question: What makes me confused is does Minoru Tanaka die because he withdrew the money since the new rule said "...The seller will die when they receive the money..." or does Minoru Tanaka die because Ryuk wrote his name in his Death Note just like when Light Yagami died? If so, why does Ryuk have to wait for one month and start to write Minoru Tanaka’s name in the Death Note?