The limited time deal includes dozens of Asus laptops from the ultra-thin ZenBook series to the enthusiast ROG series. It's a nice incentive even if the smartphones aren't the latest ones on the block.
https://www.notebookcheck.net/Asus-throwing-in-a-free-ZenFone-Max-M1-smartphone-or-500-off-the-ROG-Phone-with-each-purchase-of-a-new-laptop.445050.0.html