That's not true, we were never offered a 50/50 split.
Hearts strongly argued they would sell 50%, but that any unsold (100s at most) they would pay for. The SFA accepted this proposal because Hearts are a massive club, the third biggest in the world they say. Unfortunately, sales haven't been what they expected and It actually looks like they may be a few thousand short. Oops.
Aberdeen's proposal was that any unsold tickets would go to Celtic, which is the sensible and fair solution. The SFA said that wasn't possible (of course it is) and that Aberdeen should be rightly penalised for choosing to base themselves 180 miles away in the north-east of Scotland.