Click on Share(choose facebook if you have a fake account, or not your choice)
edit for Unlimited Trick : Open THIS LINK (https://zenmate.com/promotion/share/) in Incognito window of your browser. Click on GET FREE PREMIUM NOW. Solve the captcha. Now copy the URL of the page and paste in the Dashboard of your Zenmate account. Now your premium will extend for 3 more months. You can repeat these steps multiple times.