CheatNeutral is outlined here.
Here's the video:
As the website explains:
"We help you neutralise your cheating. Your actions are offset by a global network of fidelity, developed by us. By paying Cheatneutral, you're funding monogamy-boosting offset projects - we simply invest the money you give us in monogamous, faithful or just plain single people, to encourage them to stay that way."
It has fed a welcome debate about carbon offsets - which is a good thing.