Normal
I thought of that as well and I'm sure that is the reason why FarSight hasn't made a decision on it just yet, but the way I see it, if The Twilight Zone DLC is $5 and you have to donate $10 to get the DLC on a system of your choice, I'd rather take the $5 left over after I pay for the pledger's DLC than not get any money from them at all.