I'm really curious about this because it actually incurs some interesting possible customer service issues. Say someone signs up, then usage lapses for a while. Then they use it. Bam they're charged. Will they remember that they signed up? Some of these edge cases are defined in the article but remain unanswered. It sounds like the team at Kagi didn't even think about them, which is interesting. Still I'd like to know the answer.
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