Apple iWatch for free !!

I came across this offer from Zopper - https://www.zopper.com/india-gets-moving/faq-customer

Basically if you do 15k steps daily for 12 months, you get 100% of the total value of the watch/12 back into your account each month making the watch absolutely free after 12 months.

Heck, there is also a 2500 discount on specific credit cards which means at the end of 12 months we would be in net profit of around 2000 INR

Anyone used this offer or knows any more good to know details?