You can either sell them as Raw or Graded
Madness especially is exciting to see more of, since a deck taking advantage of its unique discard/play mechanism now has more options from which to choose
Cannot be destroyed by battle or your opponent's card effects
It's already my favorite deckbuilding website for Commander, and having my collection keyed into the site makes it even easier, a one-stop bundle to keep track of my Magic cards, decks, and everything
It takes some finagling, but this could help you keep cards that are meant to only last a single turn on the battlefield for an indefinite period, and if you double up on Warp effects with someone like Tannuk, you can get stuff like the previously mentioned Blightsteel Colossus on the field permanently that much faster
Your wishlist slot might get wasted if you add any higher rarity cards, as they are non-shareable