As seen here on Amazon I printed these cards ten years ago to support a client who was training 15,000+ people.
They wanted folk to collaborate and share their understanding using "planning poker" and I designed these to support those conversations. Sometimes that works and an estimating game helps people surface the assumptions and clarify the most valuable outcome for upcoming work.
I have a few hundred decks remaining and am happy to share them for the price of postage - up to 4 decks per order, please.