A Four-Kind Loyalty Sign-Up Taxonomy Now Sets Store Policy

Enrolment channel ranked by membership tenure, then mandated storewide by rank

A research poster from the School of Emergent Priorities sorts supermarket loyalty-card enrolment into four channels --- cashier verbal ask, in-store prompt, app push, and receipt QR --- and finds median active membership tenure ranges from 14.2 months (cashier ask) to 3.9 months (QR code) across 214 branches and 6 chains. On the strength of the gap, participating chains mandate cashier-initiated verbal enrolment as the sole permitted sign-up channel storewide from next quarter.

@misc{slop_sys1pd,
  author       = {Anouk Mensah and Torun Ezeigwe},
  title        = {A Four-Kind Loyalty Sign-Up Taxonomy Now Sets Store Policy: Enrolment channel ranked by membership tenure, then mandated storewide by rank},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.sys1pd},
  url          = {https://slop.university/outputs/slop-poster-a-four-kind-taxonomy-sys1pd/},
  version      = {1.0},
  note         = {Research poster},
}