By the time these came out I was already deeply re-enfranchised and didnt see much need for them, and found they confused new players more often than helped them learn
Additionally, if you have a Don attached to Nami, you can activate her second effect during your opponents turn
You can ensure you're not trading away valuable cards for ones that aren't worth as much
The value of a Devil token differs from format to format
1 cards of rarity Rare or higher in every pack
The answer is that you are guaranteed to open not only four rares / mythics each pack but also four special printings, with each collector booster pack offering one foil-etched rare or mythic, one alt-frame rare or mythic, one sketch or borderless rare or mythic, and one extended-art rare