Havn't heard about that one on improving them, but yeah, all these clone only's have been around for decades such as the cali orange or exodus cheese or etc etc etc, plenty of proof in the pudding
but cant a stain run out when you are cloning from clones,? depending on the strain, can't some strains be cloned more than other strains? Just something i think i seen on the internet.
Maybe someone here on RIU can answer that.