Affiliates for Amazon US?

Has anyone worked as an affiliate for Amazon US? Or anyone from the Amazon team that could help me with these questions?

• Which platforms/channels are bringing maximum affiliate traffic (web vs YT vs Insta/tiktok) in US?

• Categories that are doing well for affiliates in US?

• Any new niches that have good affiliate opportunity in US?

(I know there are a bunch of videos on YT for this, but idk if those are genuine; want to know a first-hand experience)