I am a paid subscriber and barely look at any of the paid content, and have no plans on canceling my membership.
The way I look at this, hear me out: I was struggling with pick technique, spending literally years banging my head against the same wall, doing all sorts of research, then I dug into CTC and it gave me insight I don’t think i ever would have come across, and now I have tools to solve tons of technical challenges that I couldn’t have solved before. I was so in the dark with picking for years and it really frustrated the hell out of me…now, for the most part, most things make sense.
Additionally, I teach for a living and CTC has helped a lot with any pick-related stuff I teach. So, in a not-super-indirect way, I make some money off of what I learn from Troy/CTC.
If I support CTC they are going to continue doing research and making material and making these breakthroughs in the understanding of guitar technique…that’s very good for me, and great for everybody. I want to see them continue exploring and trying to make these discoveries, AND I want to support all that they have provided so far.
I’m somebody who does music for a living, and understanding technique is really important to me, so I can understand if guitar is more of a casual interest then even with all of the above you might assess whether it’s really worth $20/month for you, especially if budgeting is very tight. Maybe if you’ve learned a lot from CTC, try to pick up one guitar student who is interested in learning this stuff from you, then you’ll be able to pay for your membership and also likely make a good profit 
Edit to add: I can’t really comment on the value of the paid content vs the free as honestly I’m just not looking at things and checking out and assessing that much, schedule is crazy and I limit myself in what ‘extras’ I participate in, and generally only get like 10 minute here and there to actually practice. It’s totally possible that there could be a more attractive balance to the would-be-paying customer. I signed up initially because I wanted to dig into all the more nitty gritty details of two way pick slanting that is covered in the paid content.
