I've never heard of it, it takes too much time I would think, its not like dogs were they breed in a day and come back home, there is conditioning and spawning and fry care and then recovery. If its a high quality show betta maybe but not a VT.
I think people would only do that locally... I can't imagine shipping them out then back. But it could be possible if you lived within driving distance of a breeder willing to lend out their bettas to other breeders...
Yeah, I figured shipping would be a lot of work just to get babies...but I was just wondering. I've never seen adds or anything and it occurred to me that it might not be a realistic idea. so I just decided to ask.
You should check out the IBC website. I have herd that for people wanting to start out breeding they send you a pair to get you started. Its only an american thing though so I could be mistaken... worth looking into though!