What is the definition of Membership Engineering?

Ah, membership engineering! Let's break it down like a punchline at a comedy club. In the world of business, it's like the high-tech version of crafting a secret social club pass. It's all about designing membership programs that are so enticing, people will sign up in droves, but then you've got to figure out how to keep them from joining the "exclusive" circle that's secretly a giant data mine.

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Here's an edgy example sentence using this fancy term: "Our new 'Luxury Loyalty' program is the ultimate membership engineering masterpiece - only 10% of users are actually paying for the VIP experience, but we've convinced them it's worth it with our elaborate benefits and the promise of a life without shopping trips."