Sharing Your Texted Me Card
The share is the confession, not the reveal.
The card: the oddly specific moment you picked ("reordered the same thing at 2:14am", "incognito-searched a job I never applied to"), the "- A" sign-off over it, and one line naming who your A is. The card is a confession - you are telling the room the detail you were worried someone had seen.
Why the card spreads: it is double-dosed. The first share is the confession ("this is the thing I was doing"). The second share is the identity question ("who is A in your life?"). Two hooks on one card is the whole retention math.
The follow-up hook: "who is your A?" - pin it, and the comment section becomes a wall of people naming their own A. The A role is universal enough that everyone can fill it, and specific enough that each one is theirs alone.