I've done online courses since 2009 (starting with an iPhone 3 and very bad lighting). Since then, my courses were published on numerous platforms and got translated from Brazilian to Japanese. In the past few years, I've decided to move them from my proprietary platform to Udemy and to leave them there as I focused more on my other business verticals.
Using SELLification (my Romanian company), I also provide over 80 recordings of webinars that we've done for teachers and sales people at this link: https://edu.sellification.org/ (+ some books and some courses from 51+ other authors). The platform has a total of 22491 active members (at the time I'm writing this text) and 7072 acquired products.