PROBLEM: From what I can gather in order to provide a product (course) to a user it is not possible for admin to send out a Coupon Code. We have to get the freebie link with limited control on the # who can access.
FEATURE REQUEST/SOLUTION: provide the option to create a single coupon code (with function to set the # of unique coupon code uses) that could be sent out to users. The product(course) could still be showing as live and used for realtime site interaction testing, or offer as an additional "incentive" check the emails, post on social media to drive free content, etc.