Refueler / Editorial

Sharp intelligence.
Quiet signal.

Original research and close observations across Bitcoin privacy, UK regulations, and the payment infrastructure reshaping how money moves.

Engineering Trust Build notes

Looks Done Isn't Done

Two pieces of infrastructure — HMAC webhook verification and a PKCE authentication chain — pass every test I've written. Neither has been proven against reality. The honest answer to why the app isn't available yet.

June 2026 5 min
Consumer behaviour Bitcoin rewards Fenchurch St line

The least loyal customer in Britain

The City worker is Britain's biggest coffee spender and its least loyal customer — until sats.

June 2026 7 min
Privacy Data architecture Loyalty apps

Nothing to collect. Nothing to hide.

Every major coffee-chain ordering app is quietly running a data operation alongside its coffee business. Most customers have never been told what it collects, what it is worth, or where it goes.

May 2026 8 min
Regulation FCA · PS25/12 Loyalty float

The float

On 7 May 2026, the FCA noticed that loyalty apps were holding customer money. The float is now regulated.

May 2026 9 min