Yes, I see that and that is probably, what some people from Blizzard thought, when they decided this. And sure, on first sight, this does not look like an issue, because preorders commonly give people little gifts, like ingame cosmetics etc.
But I am saying, that this is ethically different, because it is splitting the community in two classes, having different rights. And that is a completely different scenario, than distributing little gifts. Giving rights vs giving gifts.
Now this is not an issue if these rights
- are trivial, such that there is no meaningful difference between having the rights and not having them
or
- are obtained in the same system, in which the prerequisites for having these rights are met.
Example for 1): you do whatever (like preordering the game), to be able to enter a secret sheep level in D2R, but you can literally not do anything there, but looking at friendly sheeps. Also you can’t meet other players in there. Or you just get cosmetics or whatever.
An example for 2) would be: You achieve something ingame and gain access to an area of the game, which others don’t. Here you can meet only players, which achieved the same ingame.
Or example for 2): you are exceptionally well behaving and supportive in the forums and gain access to more forum rights.
But mixing it up has the exact same problem, that underlies real money trades in games: people get advantages over others, from things, that happen in a completely different environment and are subject to completely different rules. That’s like getting a job promotion as a game developer, because I made a half court shot in basketball. Or getting good items in D2R, because I beat Dark souls. Or getting rights to socialize in a forum, because I preordered a game.