Collectors or other resellers who buy these packs will generally hold onto them, or open them, a practice referred to as ripping

Aerial Surveyor Aethersphere Harvester Avengers Quinjet Balamb Garden, Airborne Bessie, the Doctor's Roadster Boommobile Brotherhood Vertibird Clown Car Conqueror's Galleon Cryptcaller Chariot Cultivator's Caravan Cybership Damocles Base, Sword of Kang Debris Beetle Deluxe Dragster Demonic Junker Dermotaxi Dodgy Jalopy Esika's Chariot Fell Flagship Filigree Racer Fleetwheel Cruiser Foreboding Steamboat Gastal Thrillroller Getaway Car Ghost Ark Golden Argosy Hedge Shredder Hoard Hauler Imposter Mech Jackdaw Knight Paladin Lifecraft Engine Lumbering Worldwagon Magmatic Galleon Mechtitan Core Mighty Servant of Leuk-o Mindlink Mech Mizzium Tank Mole Module Mukotai Soulripper Mysterious Limousine N'Yami-Class Mother Ship Necron Monolith Parhelion II Peacewalker Colossus Possession Engine RMS Titanic Reaver Titan Reckoner Bankbuster Recon Craft Theta Rolling Hamsphere Royal Talon Fighter Jet S.H.I.E.L.D

I think they got to echo because the "pay a fee to keep the card" aspect felt similar to echo
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Over time, this can lead to a host of issues: warping, wrinkling, discoloration, and even mold growthespecially for vintage cards that lack the modern protective coatings of newer sets
Then there are some that are better than averageperhaps including one or more Double Rare (RR) or Art Rare (AR) cards