Talk:Gold Mine/Home Village/@comment-26143266-20150224211021/@comment-2170536-20150225015640

I understand why you think that it is backwards, but the wording is deliberate. You are absolutely correct that if you fail to collect the newly-upgraded mine often enough and production ceases, you have definitely extended the catch-up point. However, that assumes you were keeping up with collecting the mine prior to upgrading it.

In every single case, the time to fill the mine increases with level, meaning it is more forgiving in terms of having to log on to collect before it fills up. If, for example, you were only able to log in once per day to collect your mines, upgrading from level 7 to level 8 would have an even faster catch-up point than 5d 8h because the level 7 drill would have stopped producing for 5.25 hours each day (neglecting, of course, the possibility of being raided in the meantime). In that case the total effective production of the old mine is only 1250 gold per hour rather than 1600, which reduces the catch-up time considerably to just under 2 days from 5d 8h.

This also holds true in the case where even the new mine is allowed to fill up. Assuming a 24-hour collection period again, both a level 6 drill and a level 7 drill would have filled up by the time they were collected. However, the level 6 drill would have stopped for 8.6 hours, while the level 7 drill would have stopped for only 5.75 hours. This brings the two mines' effective production down to 833.33 and 1250, respectively, and brings the catch-up point to 1d 16h from 2d 4h.

Now while it's true that letting the mine pause indefinitely does extend the catch-up point, I would personally surmise that if you're going to do that you've likely quit the game and don't really care about the catch-up point. :)