Tech YouTubers try to sell courses primarily for financial reasons, as creating courses takes a significant amount of time and effort, but ad revenue from YouTube videos is relatively low.
Despite the effort put into creating free courses on YouTube, ad revenue can be minimal compared to the time and work invested.
Selling courses can be more financially rewarding for creators, as it allows them to earn a substantial amount that ad revenue may not match.
Limited ad revenue from long-form courses is attributed to viewers blocking ads or downloading the content to watch offline, reducing creators' potential earnings.