Hi Flavio –
Take this for what it’s worth (my observation) of the scrub situation – There are very, very few US breedings of any flavor of scrubs in a given year. I would really only trust that an animal is truly cbb if you buy it directly from the breeder or if you are sure of the origin of animal in question.
It’s hard for me to comment on the relative difficulty of breeding them vs. JCP’s – I’ve had a few successful JCP clutches and one successful scrub (Moluccan) clutch and to be honest the only real “difficulty” with my scrubs is that they’re big and they need big cages. Also, take into account most scrubs are import and imports, of any species, are less likely to breed in captivity than cbb animals whose parents bred in captivity.
Hope this helps, good luck with your scrub adventures, they’re great animals if cared for properly.
-Rolf

Serpentes Pacifica