Udemy trainers control the pricing because of their course and here is a little magic formula. If you are wanting to get a free coupon for a specific training course on Udemy I would just simply send the instructor a message with Udemy explaining that you are obsessed with the topic they are teaching and often the instructor will reply along with one of the following:
A FREE VOUCHER!
A greatly discounted discount for the course.
Either way it truly is beneficial to you! Also, for anyone who is just looking for random training that are for free, I would stick to these pages on Zynga. After going through most webpages I feel like these are the best.
Udemy Coupons 100% Free
Udemy 100% Free Coupons
Login Facebook | Facebook (This is a group where Udemy Instructors provide free coupons)
Hopefully this helps out!
Udemy Free Online Courses certificate download video tutorial App Android do marketing for a Udemy program and although we don't really provide free coupon codes, it is one of the top selling courses on Udemy. iOS 9 and Swift 2: From Beginner to Paid Skilled