It's not a complicated thing because the people who end up drinking the wine will still smile for the sake of the wine. Merchants may buy your wine to sell it, but it will eventually be drank by people you want drinking it. What the former did is increase the range of the latter without forcing them to make a trip to your home, increasing the smiles of far more people who can enjoy the wine for the wine. You are just being a complicated little shit.
As for the Mahjong, the dude can just teach other people. Stop being so anal about selling goods and services.