Even if it meant purchasing an upgrade in order to be able to banish certain unwanted upgrade cards from appearing over and over in your deck, I would be happy to purchase such a card. Or vote in the method described in the title of this post.
Dying thread perhaps, but I was about to post my own idea about this myself, and since it's entirely relevant to this idea, I'd may as well bump this one.
My idea is this: a Card Sharkery upgrade card, that allows you to prepare some recipe or something that, when consumed (for game balance purposes, this would only be able to be consumed once every six game days, or once per IRL day), gives you a menu of card categories as given in the encyclopedia. This menu would allow you to select/deselect categories of cards to be shown (for example, I'd disable Core Stats, as I'd like to not get any more energy tank cards; 13810 is good enough, thank you very much). Alternatively, and maybe a more logical way to do it, would involve talking to an NPC (yet still requiring an upgrade card to enable the action). Maybe the crab, as the crab isn't all that essential to gameplay as it stands (in fact, when I originally reviewed the game, I completely neglected to describe the crab when running through the animals).
I was just about to come post about this. I'd like a "discard pile" for the cards I don't want/need. I've learned all the skills so the learning speed cards are useless to me, and I don't care about snaps filters. Shuffling the cards and turning up three filters drives me nuts!
I think the main probelm with this suggestion is that inevitably players will toss cards earlier on and then want them back later, and staff reports will get posted, and stuff will have to get done on the back end...
I think a better implementation might be to have a "sideboard" where cards can get shunted to at an IMG cost. While in the sideboard, you will not be shown any cards of the same type as any in your sideboard. If you want to purchase them later on, you pay the original full price. Essentially you take an IMG penalty to store them temporarily, and pay for them when you want them back. Could even make it so that you have to purchase cards from the sideboard in a "top down" manner, meaning to get to the first cards shunted, you'd have to buy one that was put there more recently.
E.g. 20 iMG to get a card be 50% less likely for 30 Ur days
Now that I'm level 33 and the iMG flows a little faster my tolerance level (aka budget) for just buying up nuisance cards is higher, but it is still flat out annoying.