Honest question: how do people have more keys than chests?

I almost never get keys, and across all my accounts I always have a massive amount of chests that can't be opened For the people who say they get more keys than chests, how? Most often I hear people say that they one trick and therefore can't get many chests, but do you even get many keys though?
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We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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