Bypass 'pay with tweet' gates.md

payWithTweet is a jQuery plugin that makes you go tweet something to unlock an action on the page. You can bypass it by running:

function createCookie(name,value,days){var expires;if(days){var date=new Date();date.setTime(date.getTime()+(days*24*60*60*1000));expires="; expires="+ date.toGMTString();}else{expires="";}
document.cookie=encodeURIComponent(name)+"="+ encodeURIComponent(value)+ expires+"; path=/";}

createCookie("tweetToDownload",true,30);

It just returns "undefined" and nothing happens, am I doing something wrong?