What does exist is lots of link-farm SEO ad copy, people claiming on forums that along with their mega-dosing iodine and salt lamps they've seen drastic changes in their cancer/aids/anxiety/pain, and then gobs and gobs of people claiming anyone that says CBD isn't a cure-all 'has an agenda to push' and/or is being paid 'by big pharma'.
Most sellers of CBD oil are outright committing fraud with claims they make, they have paid influencers (that often don't disclose clearly they are doing a paid endorsement), with fake reviews and almost certainly with armies of fake advertorials on forums.
If CBD does have valid medical benefits, it's almost certain that it will not have anywhere near the current alleged number of applications.