I'm fascinated by how large scale eastern breeders set up their farms.
However, always have a major worry. When I read about Thai breeding, they often mention how their bettas in jars only get a couple of water changes a week. Having kept bettas in small, unfiltered tanks, I've seen ammonia get to detectable levels in 24 hours or so. I'd be interested to do ammonia tests in their jars and breeding tanks.
Not to say the way they do it is bad - they clearly have beautiful, healthy bettas, but what does that say for our western fish and betta tolerance for ammonia levels?