Hi... you can perhaps create an online game using the redemption nft cards, something like axie infinity and splinterland. This will bring more values to the redemption nfts, and the nfts will sell better when they are used in a game. You can consider setting up the remdemption game in the waxp blockchains and sell the nfts in neftyblocks.com and atomichub. You can look into games like beast garden, rada quest and dark country to see how redemption can be a game in the waxp blockchain. I typically play games like train of the century, alien worlds and nft panda, but they are not card games, yet they involved the use of nfts which I buy and sell in order to play the game. I think nfts alone won't sell, unless you can use it to earn some kinds of tokens which can be sold at alcor.exchange. Alien worlds, for instance, allow you to mine with nft card, shovel for tlms (a kind of token), which can be sold at the alcor.exchange for waxp. Waxp can be converted to usd at exchange like crypto.com. Train of the century allows you to send the train nft card to a station, where, you can earn tocium, a kind of token, which can be traded at alcor.exchange for waxp. You can set up a redemption card game, where the winner of a game earns some kind of tokens that can be traded at alcor.exchange, and sell redemption cards at nefty blocks based on their rarity in booster packs, which can be opened at neftyblocks.com. For instance, for the train of the century game that I played, the cards actually are sold in booster packs, and what cards you get are completely random. Cards can be commons, uncommons, rares, legendarys or mythics, with mythics having at most 100 cards minted. That means, a owner of a mythic nft can at most purchase 100 mythic cards of the same type. This increases the value of the cards as it is not so common. A mythic card can sold for US$200 while a common sells for only a few cents. The game train of the century can be found here: https://trains.cards. Other game of the waxp blockchains can be found here: https://playtoearn.net/blockchaingames/WAX/All-Genre/All-Status/All-Device/All-NFT/All-PlayToEarn/All-FreeToPlay.
I think nfts have more values when it is linkef to a game, and redemption nfts will increase in values if it is found in a game. An online game, based on the redemption game. Hope you consider my suggestions