yes, they were, as far as i know cb are not available anywhere on a pet trade lately, attempts of breeding were made and some were successful, but as far as i know people have hard time keeping them long term, and i think we might came up with why based on our experience.
I don't think they should be avoided, but due to not much captive care information and information about them in general it is hard to keep them, once I do all my research and test theory, I will probably write a care sheet. As with any species the more information you have the easier to keep.