The word earn used with the word edited is bad grammar.
It should be "Edit first post that was inactive for 6 months".
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6meta.stackexchange.com/a/250351, didn't you know that I reported all the possible bugs? ;)– nicaelMar 28, 2015 at 19:42
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6And I don't get the downvotes there - that's really a bug.– nicaelMar 28, 2015 at 19:46