https://pipdecks.com/

Also targeting business executives (via YouTube) as a storytelling deck: https://pipdecks.com/pages/storyteller-tactics-card-deck

Described as "expert knowledge in your back pocket", and sold as a "toolkit" with "practical step-by-step recipes", and "templates."

They offer 7 decks of tactics for Brand, Team, Storytelling, Innovation, Productivity, Team, Workshop, Strategy.

Something @chrisaldrich mentioned on Reddit as examples of someone selling niche Zettelkasten decks. Seem more like protocol-kasten decks to aid problem-solving in specific contexts.

Saw this ad for Storyteller Tactics on Instagram: https://www.instagram.com/p/CiybhKcA3ZV/?hl=en

They're advertising for a product from https://pipdecks.com/. They're essentially selling custom zettelkasten collections of cards for niche topics!