1.) It is one of the rare ways to specifically target a tokenand there are situations in multiple formats where that ability matters: Marit Lage comes to mind
Palkia ex : This legendary Water deck uses Palkia and energy generation to hit all enemies at once
First, when you cast a creature with the mechanic, as an additional cost, you may pay the Squad cost (that number written next to it) as many times as you like
The current top price paid for an Enchanted Rare copy of Stitch, Carefree Surfer is $2,000, paid for a copy of the expensive Lorcana card graded at 9.5 by grading specialist Beckett and sold via eBay in September 2023
The closest I could find to anybody doing it in the mainstream recently was Artifact (I know, I know, I'm stretching the word "mainstream" here) with a slightly bastardised version of the concept handled via Steam's marketplace, and even then it's still an online auction house, not just doing fun swaps with your pals and saying "well I've got this, what've you got?", like exchanging the best parts of your packed lunches at school
