It might be a stretch to insinuate that the trading cards had anything to do with that, but realistically, it was the first of the Pokemon name to branch out in earnest and try new things
Springs Secret Lair Superdrop marked Hatsune Mikus Magic debut, and cards from the Hatsune Miku: Sakura Superstar drop also sold out extremely fast
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It added more Pokmon-ex to the game, which pushed the meta further toward using these cards
"But I think a really key factor would be social media, and its impact on all collectibles in the last 20 years." Considering the growth of the subreddit from under 1,000 subscribers in early 2021 to almost 30,000 now, as well as amassing 150k weekly visitors, it's clear that this group of collectors has expanded alongside the surge in Pokmon cards