Its rare to see Mill decks anywhere in Standard, never mind in the upper ranks of a major event
Not only is it very friendly towards free to play users (meaning you can get most of the cards for free by simply playing), but theres also a system in place where if you buy a pack of Pokmon cards in real life, theres a code inside to have those cards found in the booster in your digital collection
Not properly packaging the cards
These decks are by far the best way to get going with Disney Lorcana
For example, Dark Magician support just got added 2/20, and if you happened to have extra glossies, that's 800 R jewel savings right off the bat
Pillar Analysis: Iconic Art & History, Scarcity (Arabian Nights, Reserved List), Collector Demand