I use used coffee grounds to kill aphids, scales, mealy bugs,spider mites, and white flies. For some reason, adding cinnamon to the coffee mix enhances the kill results and the lasting affect when I use the grounds as a mulch for long ten treatment. I think someday people are going to find that cinnamon can be used as a catalyst to enhance several medical applications.
I found that using lecithin which is used to stimulate brain activity, made a great catalyst when I used it along with Karo syrup every two weeks on some test plants. I was able to make a certain cycad grow to be triple the size in 7 months, which in this case was a 3 inch increase. At the time, these plants went for $250 an inch of stem, so that was a significant difference. People just need to experiment and find out what other uses cinnamon has.