American Express - Add all offers to card at once
If you own an AMEX card, you can add a bunch of offers to the card in this link: https://global.americanexpress.com/offers/eligible
There are many offers, and they change all the time. Instead of clicking "Add to card" repeatedly, I created this bookmarklet.
In Chrome, add a new bookmark (right click on bookmarks bar -> "Add Page...") with the following URL:
Just visit that bookmark while on the offers page, and watch the magic happens!