>>56807485My guess is because trading is going to be very restrictive and you'll only be able to trade dupes and only after reaching a certain account level. So they probably want to give people enough time to level their accounts and build a collection before enabling trading.
The speculation I saw was that trading would require your account to be level 15, can only trade cards of the same rarity, and you can only trade a 3rd copy of a card (i.e. you cannot trade below 2 copies of any given card at all times). Which would make sense to detour accounts trading to themselves