1) By posting videos to YouTube, they will eventually be able to monetize the videos/channel via YouTube’s revenue-share program. (Channels like ChilledCow can earn up to $1,000 or more per video).
2) In one of the OTOs, there is a feature that allows users to add a link/button to their video at a certain point within the video. They can use this to send watchers to ANY link, website, affiliate offer, product, etc.
3) You can make videos for clients or sell videos they create, GYPHIO includes a commercial license.