I worked at Amazon in 2021 and rage-quit after 9 months. The sign-on bonus I received was paid out monthly, so I didn't have to pay anything back. If it's large enough, they pay it monthly because they know it's very likely you won't make it to the 2nd year.
Glad they've fixed that.
(Still, though - why work for people who know they're going to treat you so badly you'll probably have to quit?)