Wow. That is really insulting, and a sweeping generality: "Full" of half-rate vendors?
Electro-nic-Stix? Liquid Express? e-liquid Planet? These vendors have all been around for several years with no sign of slowing down. Some produce their own mods, all produce their own USA made juice and most sell your 'mass-market' e-cigs. (Which, work like crap for me, but that's another conversation.) Clouds of Vapor? He's a little newer, but started out as an ECF member, did his research and takes care of his customers.
Altsmoke? They didn't have their own table, but they were there selling their new mod at another table. Supporting their product. I can't think of anyone around here that would think ANY of their products were not worthy of getting for a fair price, let alone free.
I found that most of the venders there were just selling eGos. Of course there were mods...I didn't particularly see anyone buying anything though...which I thought was interesting. It just wasn't for me...I would have liked to see VaporKings...Vapor4Life...Bloog...Nhaler...LeCig...but it just occurred to me...I was the only one there using something as small as an 808...so maybe it just wasn't the place for me. I was expecting a convention where people would be showing a bunch of devices that are on their way to the market...and all I saw were eGos and a handfull of mods that have mostly been seen before.
To me..a convention is to show off upcoming products...and that is why I paid to go...to see what is coming.
My perspective must be different from yours...but I also probably am a different breed of vaper then you...I found it humorous as I walked around with my Bloog...keeping my Hybrid Mini tucked away in my backpack.