Anyone can add money to it and pick a daily spend. By default money lasts seven days. The more a coin spends a day, the more hours on screen it gets, and it pays only for the minutes it was seen. Whatever is not spent stays in the pool.

Install the Mac app and sign in with X. Coins in the pool take turns in your menu bar. You keep up to 70 percent of what a coin pays for every minute the Mac was awake, unlocked, showing it and being used. Each day's pay can be claimed 4 days later. You claim it from your wallet and pay a small network fee.

Counts the minutes on the server and publishes every day’s payout tree. Anyone can recompute it.