Monetizing much of anything on the Internet is difficult. Some activities or hobbies will always be just that. Not a lot of crazy rich fly fishing celebrities out there ever. Most fly fishing celebrities scrap through and have day jobs. So if Drew is thinking he will he will hit pay dirt with fees for information it will not happen. My guess is was just looking for a way he thought fair to charge with all the information he was sharing.
In fly fishing you are going for status or sharing, but never money. Fly fishing is a niche interest and even for a hot chick with a fly rod, it would never pay even on Tik Tok. The only exception of course is if you start a fly fishing forum. Pure gold and incredible ROI.