There's already a knock off of it (but it doesn't contain careo -- the active ingredient) and they're making ridiculous claims of instant growth. That's nonsense but I think they're going with the fact that you will feel a boost if you take it pre-workout and maybe hoping it will delude kids into thinking they're Jay Cutler in 5 minutes. I hate that kind of advertising but the surge in strength should be pretty immediate.
How does 500mg of your Cassia Grandis (content of 2 capsule dose) compare with, say, 15 mL of the Tropical Wonder carao liquid? I'm not sure anyone ever posted the concentration of cassia in the liquid, but surely PF looked into it.