I've been offering online audiovisual classes for more than two years. Most of my Udemy courses (https://www.udemy.com/user/drlewispulsipher/) cost modest sums, $39 (with coupon) for the most expensive, in line with book prices. (After all, they're oral books, practically speaking.) One offering is free with a coupon, another is absolutely free.
I've found that the hardest critics are the people taking the absolutely free course. The ones using a coupon to take a course for free are much like the ones paying for a course, in their ratings. It's as though the free(loaders) are looking for TV, looking to be *entertained*; the poor ratings typically refer to production quality (which is not TV quality, no more than any classroom instruction), while the good ratings refer to the content.
The absolutely free course consists of videos from my free YouTube game design channel, which I state up front. I get fairly-rare criticism on the channel, but not like this offering on Udemy.
I'm told that in the business world, customers don't respect or value what they're given for free. Perhaps the same thing is happening here.
The moral? My intention to have no more free-without-coupon courses has been confirmed. There will be more collections (not really courses) from my Channel, but free by coupon only.
"The worst form of inequality is to try to make unequal things equal." -- Aristotle
"Always do right--this will gratify some and astonish the rest."Mark Twain
"A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away." Antoine de Saint-Exup'ery
"Not everything that can be counted counts, and not everything that counts can be counted." Albert Einstein
"Make everything as simple as possible, but not simpler." Albert Einstein