Sensei is a learning management system for WordPress from the makers of WooCommerce. WooCommerce was acquired by Automatic, the parent company of WordPress itself.
There are currently no active Sensei Coupon or Sensei Discounts available.
Sensei was and is a side pet project for WooThemes. It was never a serious learning management system and receives very little attention and improvements.
Also the fact that it will require several hundred dollars of additional extensions to function properly, I really can’t recommend this for anyone.