It sounds like quackery but I tried it for a couple months and comfortably went down .5(or is it "up" -.5?) and stopped going up every year. I stopped because the constantly switching strengths, self testing and having to remind myself to take breaks and look far away was more than I had the mental bandwidth for at the time. The "marketing" website reads like snake oil sleazery but what worked for me was the community wiki. Id spend hours correlating what was in the wiki with what he was hinting it at in his "hear my pitch for 10 minutes before I get to the point" videos until I got the hang of the routine, which was basically:

Have two pairs of glasses, one of them about half strength(self test for the exact number) for computer and close up work or in-home. Use your full strength glasses for important tasks like driving. Every 20-30 minutes take a break and look into the distance(works well with Pomodoro technique, if you do that), practice your blurring exercises.

Edit: at .5 adjustment I'm right at the edge of variance. It's possible to do nothing and have a slight improvement on your yearly optometrist visit because of secondary factors like change in environment or nutrition. I'm not a health expert so I can't say, but if anything that site helped me to do fewer things that strain my vision and a few things that made me more comfortable. Would I have fully cured if I kept going? Science says probably not, but I don't regret my effort.