that’s absolutely shady, the three businesses were listed as exhibitors at the convention with booth numbers? That’s BS - fraudulent. I recently drove 2 hours to a Maine convention because of Dynasty Seeds and a couple other vendors I wanted to check out.
The exhibitors are the reason you pay for the ticket. The convention is a chance to meet these people face-to-face and talk to them.
PS, I see Marrone Bio was there - I met their guys in Boston and they admitted they had no answer for fungus gnats! They felt bad so they loaded me up with some free hats & stuff.