Protoss: But they said it will be only available on Steam via the pre-order, and it is not.
What SLP200 said, and I guess it comes down to perception.
The only way to have it in your Steam library is to pre-order; it doesn't really say it won't be available anywhere else.
"Only way to have it in your Steam library", not "Only way to have it" or "Only way to have it is on Steam".
Perhaps they could have worded it a bit more clearly, because it could be taken both ways. I initially agreed with you until I looked at it again. Maybe they should have said "not exclusive to Steam" or "It will be available elsewhere, but the only way to have it in your Steam library is to pre-order it."