Sports betting and sports activity started about the same time, so it has always been a thing that ran along together, it's just now that the system is beginning to get corrupt and leading to match fixing, else for the decades that sports betting starts, there was no record of match fixing. The major advantage of sports betting and bettors reign praises on is the possibility that they are able to double their money from it, though it's not guaranteed but it still favours many people.