1. I tried here (India) without using a VPN or setting US IP and the promo is working for me.
2.If you notice an error, set country to the United States on Hola extension.
For this promo, you need US IP, so either launch Hola addon on your chrome browser (set the country to the US)or use VPN such as Windscribe or F-secure FreeDome.
Follow this link and enter your email address to receive a free 6 Month Subscription.
This promo works for new users, so try with a temporary email address such as 10-minute mail.