amex_add_all_offers.js

// https://global.americanexpress.com/offers/eligible

function main() {
  bs = Array.from(document.getElementsByClassName('offer-cta')).filter(button => button.getAttribute("title") == "Add to Card");
 
  if (bs.length > 0) {
    b = bs.shift();
    console.log(b.getAttribute('title'));
    b.click();
  }
  
  if (bs.length > 1) {
    console.log(bs.length);
    setTimeout(main, (4000));
  }
};

main();