Yeah, the buds you buy come from female plants. The male plants are not really sellable, although they could be made into hash.

Anyway, the seeds appear when whoever grew the bud did not get rid of males soon enough, or didn't worry about it at all. Shwag usually has lots of seeds because they just plant a field of it and don't do anything except basic care water, fertilizer until the buds are harvested.

Mids I think must be a more professional style grow gone wrong. The guy had a hermie or there was a male he didn't notice until too late or some pollen came in from somewhere else he couldn't anticipate, so he doesn't have "dro" anymore, and has to cut the price and call it mids. At least that's what I think happens. The corn I usually get has about 12 seeds in 1/2 oz. Schwag when I buy it has about 70 seeds per oz.