Who runs Packed
Packed's terms name PlayPacked, Inc. dba Packed as the operator, with an arbitration agreement. PackRipper reports it's a US-only iPhone app.
Besides solo packs, the app runs live rips with hosts and in-app auctions across Pokémon, One Piece, baseball and basketball.
Buyback and the Vault timer
Packed's site says you can sell any pull back at 100% of market value. Its terms say the Vault tab shows how long you have to sell a card back before it's sold back automatically; PackRipper reports that window is one day.
The Vault holds no more than 10 cards. Add an eleventh and you'll be asked to sell one to make room.
Money in and money out
Money you add is purchase credit: the terms say it can't be withdrawn and isn't refunded. Proceeds from card sales can be withdrawn from $10 to a debit card, bank, PayPal or Venmo after identity verification, with instant withdrawals averaging about 10 minutes.
Referral packs
The Game Haus reports referred friends get a free Basic pack after spending $25 and a free Bronze pack after spending $200. Check the offer in the app before relying on it.