Because the deal involved stocks and cash, the total value of the deal was likely agreed upon before but the actual amount of stock Adobe had to pay was likely

Because the deal involved stocks and cash, the total value of the deal was likely agreed upon before but the actual amount of stock Adobe had to pay was likely dependent on the day of announcing it. So the higher the Adobe stock when the deal announced, the less Adobe had to pay. From April 2022 to September 2022, Adobe's stock was fairly stable (relatively). So I'm not sure if I buy this argument.