Um I'm sorry to seem rude but most of this information is incorrect.
For one you should have known going into this that EBJD are not the easiest fish to care for many die before reaching 3in. The reason for this is all the inbreeding that has weaker there immune systems and caused internal deformities. One of the main things I'm concerned about when it comes to breeding these wonderful fish is not money. I see posts all the time of people recommending breeding EBJD as a way to make money. Its really not, if your not 100% prepared for the challenges of caring for these fish to start you will be out a nice sum of cash. The thing I look at while breeding a raising a spawn is how can I increase the survival rate in the long run. How can I get a whole spawn of EBJD to reach there max size and reproduce. To start never inbreed them AT ALL!! I currently have over 100EBJD fry growing out from just one pair of BGJD. That's pretty dang well for the second stage of my project. I also make sure to take extensive care of my Jacks many of you have seem my photos and the current EBJD I'm about to start breeding, almost a perfect specimen. I did not buy him from a trusted breeder, I took a chance and snagged him at 1in from the LFS. One thing that will help anyone raise these fish to maturity is CLEAN WATER when your waters clean your fish thrive! I would mever say EBJD are worthless you get your self a nice male and female BG as a partner you can easily make 175.00 for larger specimens. I noticed you said that a EBJD x BGJD (BGJD = a Jack carrying the recessive Blue gene) you get 50% EBJD 50% BGJD. Not sure where you got 15% from but I wanted to clear that up.
Also as to the EBJD being a hybrid it is not. It's been proven with Genetic testing, and is a natural variety of the Jack Dempsey. The only reason you don't find them in the wild is really easy to understand.
Your a bird flying above a pond. Below the surface there's an EBJD and a Regular Jack Dempsey swimming side by side. Which one do you think the bird will notice? The EBJD a bright colored fish is going to stand out more than the darker of the two. Darwin's Law of Survival of the Fittest.
Sorry for bringing back a dead post but I needed to clear this up. :thumbsup: