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And even though a card like Swords to Plowshares is also a goodstuff card and sees even more play than Rift, the blue bounce spell gets a more negative reaction because it's such an extreme blowout whenever it resolves
With Feed or Food, Astarion, the Decadent increases how much life you gain in your turn or doubles how much life your opponent loses (which, depending on the actual amount, might just kill that player)
Such attributes rarely add up to a card not cube worthy
Liliana's Contract I am a complete honk for alternate-win-condition cards like Liliana's Contract
Now, you're probably wondering why we are spending so much time in an article about Un-set finance talking about who Un-sets are for, and while this is a fair question, the "who is it for" and "who will actually buy it" questions are what underlie the entire discussion of Un-set finance