Feeders
I can tell you from working in stores, that people who tend to get betta's like their fish a great deal more then those who get feeder goldfish or common comets, and you have to look at the environmental requirements of the fish, a betta can survive in a 1 gallon vase or even smaller for the entire lifespan of the fish, particularly the new set-ups people are getting with a plant. however goldfish are meant to get large and live for very long periods of time, so to keep them in a small tank(very common if not more common then big arrawannas, about even with pacus and oscars, just because there are much more of those in tanks than arras) or even in a bowl till they die(incredably common) every bad situation like bad care, small enclosesure, or the simple fact people feed them to oscars and pacus and the like when pellets would be much better for the fish makes feeders the most abused. and for those few who do get the nice cheap goldfish and put them in ponds, im soooo happy you exist but you are the great minority.