Since comment counts are meant to be for the total comments in a thread (as in half made by you, half made by the other player), your first proof would count as 2 10-comment threads, instead of just one. That means you provided more AC than is required for Basic AC as you could've made it with the first two AC proof links alone. Therefore, we'll consider the last proof as satisfying the Bonus so you have that as well.
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Since comment counts are meant to be for the total comments in a thread (as in half made by you, half made by the other player), your first proof would count as 2 10-comment threads, instead of just one. That means you provided more AC than is required for Basic AC as you could've made it with the first two AC proof links alone. Therefore, we'll consider the last proof as satisfying the Bonus so you have that as well.