Our boiler developed a small leak yesterday, so we called British Gas, and they sent out an engineer who has fixed it and serviced it. Excellent!

But I've also received an email telling me that apparently I've opted into some “Rewards” bullshit. So I log into my account on the web and opt back out. They ask why, without a free text field. Tickboxes include “I'm not interested in the bright ideas” but not “I never opted into this bullshit”.