Pack points update

Hi PTCGP dev team,
Thank you so far for your time and effort into developing this game. It's great that it can be either a casual game or more competitive, and anything inbetween depending on the type of player you are.
I started playing on day 1 and have a suggestion for the game:
So what I was thinking is when players get more then 2 of that card they can exchange it for pack points, and it would work kinda how the trading is.
you can exchange any card for pack points if:
- You have 3 or more of that card
- It CANT be a promo card
when players exchange the card for pack points they could get half or the full amount it costs
Ex). If I got a card that costs 70 pack points, if I exchange it I would get 70 pack points.
Ex2). If I got a card that costs 70 pack points, if I exchange it I would get half of the full amount, so I would get 35 pack points