I just noticed your comment and I thought you may perhaps be interested in Gumroad. It is similar to Udemy, but they take a scaled-down slice. And Additionally, there are a number of premium insert-ons – which includes a relationship into the GrassBlade LRS (in your case e-Understanding geeks available) http://jaredvkxmz.widblog.com/50943594/pay-for-exams-can-be-fun-for-anyone