Sly by DesignSly by Design — the South African deceptive design registry. Documenting dark patterns and deceptive architecture in banking, insurance, and rewards products.https://slybydesign.com/en-zaUse it or lose it: how Vitality Fitness benefits expirehttps://slybydesign.com/analysis/use-it-or-lose-it-vitality-fitnesshttps://slybydesign.com/analysis/use-it-or-lose-it-vitality-fitnessA plain-language walk through the expiry and forfeiture rules in the current Vitality Fitness terms: free workouts that don't roll over, booking credits tied to a cancellation window, packages that can be expired at 30 days, and what happens to a booking when a facility leaves the network — with the page and record ID for each rule.Mon, 27 Jul 2026 00:00:00 GMTThe lock-in evolved: from contract terms to economic architecturehttps://slybydesign.com/analysis/the-lock-in-evolvedhttps://slybydesign.com/analysis/the-lock-in-evolvedDiscovery's own documents, 2018 to 2026, show loyalty-programme lock-in moving out of contract terms — fixed periods, cancellation clauses, notice promises — and into the economic architecture of the products themselves. The registry's first five entries document the mechanisms.Sat, 25 Jul 2026 00:00:00 GMTA currency that isn't one: what the documents say Discovery Miles arehttps://slybydesign.com/analysis/a-currency-that-isnt-onehttps://slybydesign.com/analysis/a-currency-that-isnt-oneDiscovery's current documents describe Discovery Miles as a rewards currency, pay a wide range of Vitality Health and Vitality Money rewards in it, let members convert it to cash, and pass the balance to a deceased member's estate — while expressly disclaiming that Miles constitute currency, and reserving the right to change what Miles earn, buy and are worth.Fri, 24 Jul 2026 00:00:00 GMTOrganised by combination: how the rules are published, and what that structure showshttps://slybydesign.com/analysis/organised-by-combinationhttps://slybydesign.com/analysis/organised-by-combinationDiscovery publishes its Vitality product rules across five product-combination tabs, not per product. Mirroring that structure document by document shows what it produces: benefit guides served in different versions on different tabs, documents that exist only for certain combinations, inconsistent names for the same sections and files, and current documents stating different values for the same limits.Fri, 24 Jul 2026 00:00:00 GMTWhat happens to your Discovery Miles when you leavehttps://slybydesign.com/analysis/what-happens-to-your-discovery-miles-when-you-leavehttps://slybydesign.com/analysis/what-happens-to-your-discovery-miles-when-you-leaveA plain-language walk through the forfeiture and expiry rules in the current Discovery Miles terms and conditions: the three expiry circumstances including the dormancy rule, what happens to the balance if you close your bank accounts or cancel the earning Vitality product, and what the documents say happens at death.Fri, 24 Jul 2026 00:00:00 GMT