When you go to drop your own Dockside Extortionist you are either forcing your opponents to sacrifice their Treasure tokens early in response, or they will be giving you a ton of Treasure tokens of your own
People learn things at different paces and with different strategies, and some just want to learn on their own without a seasoned pro walking them through it
The Key lets you slip gigantic cards without trample past chump blockers and the Staff lets you stay untapped to block while simultaneously tapping down opponents blockers
Can You Play Madness Creatures at Instant Speed
Cards that make duplicate, extra, or double the tokens abound here, so if you can build something to take advantage of that excess while surviving through the turns when your stuff is a bit durdly and slow, you will have a powerful deck that can bide its time and then pop off
If WotC abolishes the reserved list and reprints the cards on it, they could lose their value, and the collectors who had invested in the cards would no doubt see their collection lessen in value