I use Monster Cricket Diet made by Zeigler Bros. Its the cricket chow used by Dr.Gary Ferguson and many other creditable people. Highly recommended for chams. I also use fresh bee pollen on a regular basis. A combo of the two make the ultimate gutload. (along with kale and citrus) Im not sure about this cricket crack. I wouldnt feed my insects some jazz made by some dude. But hey I dont know anything about it.....
And just because crickets destroy the stuff quickly, doesnt mean its the best gutload. Food for Thought!