Adding affiliate links to the "About the Author" box is like offering ice cream to a lactose intolerant person. They want to take it because it looks delicious but they know that it will hurt them, so they reject the offer. Publishers will do the same to articles that include affiliate links in the "About the Author" box, they will automatically deny acceptance. Your content may look appealing just like the ice cream in the illustration, but the Publishers have to look out for their own interests first.
The best thing to is to include a link in the "About the Author" box that sends visitors to your normal website. Then from there, you can redirect readers to your affiliate page. That way everyone is happy. Publishers accept more of your articles and more readers visit your website.