Maybe they thought the stamp was fake
Efficiency can be determined simply by the reward you receive at certain mana costs (Counterspell and Cancel do the same thing, but Counterspell costs less), the total payoff you receive from a single card (Hull Breach and Decimate are both good cards, but Decimate usually covers much more ground), or the payoff you receive in conjunction with other cards (Anointed Procession makes other token production cards completely absurd if unchecked, which is usually better than adding one more card that simply makes tokens like Spectral Procession in a token strategy)
It also comes in $0.72 below TCGplayers current $40.21 market price, while landing comfortably under the current $42.14 listed median
This BGS 10 Pristine Alpha Lord of the Pit, which sold for $105,000 in 2023, is a one-of-a-kind collectors piece
(Each pack contains 10 random cards)
Typically these are used in concert with discard effects in decks with heavy graveyard synergy as you will want specific things in the bin and wont be able to control whether you draw them or not
