I've put about $1,500 into my NFTDraft cards and the game has always pitched how important it is to blend your cards up to the next level but the funny thing is that the more you blend your cards up, the more your account values decrease.
The points boosts are barely worth the cost of leveling up and the game hasn't really even been that useable so far this season into season 2.
It just hasn't seemed worth it to me and there's nobody buying cards either. I've tried to sell through a few different channels now and haven't sold a single card.