Get 15 OPEX Tokens worth around $15
Go to their Google Form
Join their Telegram: https://t.me/optherium_club
Download application:
https://itunes.apple.com/ua/app/vivuspay/id1390247834?mt=8
or
https://play.google.com/store/apps/details?id=com.optherium.wallet
Sign Up in the application
Post a Proof of authentification in this thread: https://bitcointalk.org/index.php?topic=5002755, or Facebook, or Twitter