Buying raids and buy IO score are a lot different. Buying a raid clear wont suddenly get you into mythic guilds where as buying score will. Not to mention its a lot of accessible and cheaper. Second, thats not the only problem with Raider.io. The way it tracks scores is problematic and unreliable. sometimes you are doing extra work because it didnt properly track your score. The higher up you are the less this becomes a problem but it is the definition of a system that very hard to start late in and thats a core problem.