Not saying that the hops you rubbed didn't have seeds in them, but a lot of it has to do with how much of what is available at any given time. The cream of the crop goes to the guys with the most pull, but being that there's not enough of certain varieties (like Mosaic) planted, even the big players have to take what they can get until acreage can keep up with demand. Most of what I dry-hop with are varieties like Mosaic, Citra, Simcoe etc. so I'm pretty excited the following spring to see what comes up as those seedlings will be carrying some of those genes with them. It's a long shot but you can't win if you don't play!