While not that big of a deal in terms of the game it feels like a reasonably big deal in terms of design philosophy
Play boosters debuted in Murders at Karlov Manor and were developed to keep balance between the fun of opening set boosters and preserve the Limited environment

Affinity/Artifacts Armix, Filigree Thrasher | Illustration by Daniel Ljunggren Commander (2) Armix, Filigree Thrasher Keskit, the Flesh Sculptor Planeswalker (1) Creature (22) Walking Ballista Disciple of the Vault Chronomancer Virus Beetle Triarch Praetorian Psychomancer Arcbound Ravager Burnished Hart Scrap Trawler Weaponcraft Enthusiast Lodestone Golem Grim Hireling Imotekh the Stormlord Kuldotha Forgemaster Duplicant Noxious Gearhulk Marionette Master Phyrexian Fleshgorger Meteor Golem Technomancer Herald of Anguish Metalwork Colossus Instant (2) Sorcery (6) Battle at the Bridge Terisiare's Devastation Monumental Corruption Taste of Death Their Name is Death All Is Dust Enchantment (2) Underhanded Designs Agent of the Iron Throne Artifact (29) Sol Ring Bag of Devouring Blood Fountain Smuggler's Copter Noble's Purse Jet Medallion Reckoner Bankbuster Ichor Wellspring Prized Statue Cranial Plating Treasure Map Charcoal Diamond Mycosynth Wellspring Lightning Greaves Sculpting Steel Skeleton Shard Nettlecyst Bontu's Monument Aetherflux Reservoir Mystic Forge Trading Post Slagstone Refinery The One Ring Weatherlight Hedron Archive Gilded Lotus Ugin's Nexus Bolas's Citadel Portal to Phyrexia Land (37) Shrine of the Forsaken Gods Temple of the False God Myriad Landscape War Room Mishra's Factory Reliquary Tower Arch of Orazca Hall of Tagsin Wasteland Inventors' Fair Bojuka Bog Cabal Stronghold Castle Locthwain Urborg, Tomb of Yawgmoth Swamp x23 The analog to enchantress decks, artifact decks, sometimes nicknamed affinity decks, are exactly what they sound like

Since job select creates a HeroHero, and auto attaches the Equipment to it, the Black Mage's RodBlack Mage's Rod turns that Hero into a makeshift pinger
That player discards those cards
Specialist sites can offer a bit more detail and better protection from counterfeit cards, though youre less likely to find a complete bargain as they will know exactly what a card is worth