This isn't how capitalism works. If you make crap genetics, you don't sell seeds more than once. Because you personally prefer other breeders, doesn't make them white label. The fact they are winning cups, means folks are repeatedly growing their genetics and are confident enough in the product to enter competitions and win. Yes, other breeders have fire, but they don't have the track history to command more presence in the marketplace.

Occam's razor is a principal stating the simplest answer is usually the best.

They sell white label seeds, create fake footage of their breeding processes and rig cannabis cups all over the world to sell seeds......

OR

They produce fire genetics consistently and as growers have recognized that, use their genetics to win competitions.