Ah, but they did give players 'what they asked for'. As the old saying goes though, "there is no such thing as a free lunch." You already get a free magitek armour mount by playing the storyline normally, and can get a second one of a different colour as an achievement reward by getting enough player commendations.

There is absolutely no reason you need these extra mounts, they are just for fun, and so, like most things in life, you want extras, you need to be prepared to pay for them, that's just how the world is.