User blog comment:TravelBitten/Testing the "Double Your Money" Crystal Alchemy Store/@comment-5039776-20120920084337

Even if you're on a perfect 9 hour collection cycle, you must allow for sleep. For example, suppose we start a cycle at midnight, assuming you're still up.

The cycle would go: Midnight -- 9 am -- 6pm  -- 3am!!!

Not a hope!! It's likely you'll "leak" 4 or 5 hours.

Doesn't matter when you start the cycle, you'll always end up, sometime in the middle of the night.

For example: 10 pm -- 7am -- 4pm -- 1am (doable) -- 10am -- 7pm -- 4am (whoops!)

There is still a profit, but not as much as they advertise. And it takes a long while to get your "money" back.

Having said that, I bought one :)