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.
Ill let Noah Bradley, someone who paints a prodigious amount of cards, makes a good living from it, explain why hes got signing fees
This is not a quiet period for the hobby
Each box is packed with Play Boosters, borderless cards, cards in the all-new chocobo track foil treatment, and lots more
His true power, however, is his ability to create a 0/0 Construct token at the beginning of your end step
Also, Giant Inheritance returns to your hand in the case it gets removed, just like Rancor does