This was quite helpful, even though I use Peakmonsters frequently. I never noticed the filter to see cards not used in the last 7 days. Thanks for this!
And you, how do you manage your unused cards? Do you prefer to sell them, rent them, or keep them idle?
It's always a tough choice for me. I have a lot of 1 BCX/CC Chaos Legion cards that I don't think will sell unless I combine them. So I'm waiting to possibly burn them for Cinder or burn them for DEC.