They have a vested interest in maintaining/expanding their business so just like card grading companies, they understand it's ideal for them to "create value" out of nowhere and if an auction sets a new record, it's not like they have to worry about due diligence to see if the price made sense or who the seller and buyer are and if they have a preexisting relationship or what, they just take their cut and that's it.
Alaborn Cavalier Argivian Cavalier Cavalier of Dawn Cavalier of Flame Cavalier of Gales Cavalier of Night Cavalier of Thorns Conclave Cavalier Daru Cavalier East-Mark Cavalier Goblin Cavaliers Gustcloak Cavalier Kinsbaile Cavalier Mesa Cavalier Saddle of the Cavalier Stillmoon Cavalier Sunrise Cavalier Swordsworn Cavalier Veteran Cavalier Wilt-Leaf Cavaliers
Tapping Mirri after creatures have attacked will not remove creatures from combat
More importantly, its also not the first time that Scalpers have been able to find a loophole in the Secret Lair queue system, potentially throwing the sale in disarray
Viviens Grizzly This bears role is to filter the top of your deck for answers and tutor them to your hand
Ruinous IntrusionRuinous Intrusion and Return to DustReturn to Dust round out the tiny spot removal suite for this deck, and are decent cards, but again, the total number is too low and the deck will suffer for it