That's because c**k suckers like Quilter and the other restaurant bashers on that forum think the restaurant / pub businesses in Korat revolves all around them. This is why any sane person would never open a restaurant in Korat that caters to farangs. Aside from the poor revenue generated from the cheap charlies, who would want a bunch of drunks in their place that spend very little money? If I had a restaurant, I'd cater to the middle class Thais. Farangs would be welcomed, but I sure as hell would never rely on them as my main source of revenue. All it takes is one of these restaurant critic experts like Quilter or Buadhai to ruin your business on Alfie's forum. Now if you catered to Thais you wouldn't have that problem because Thais don't read the farang forums.
Also, most Thais won't go in a place that's filled with a bunch of loud drunk farangs, unless of course they are free lancing their "personal" services which can clearly be seen at many of the local farang watering holes. I can't see any restaurant / pub that caters to farangs only making any serious money, unless of course they are delving into other activities like dealing drugs, prostitution and stuff like that.