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Explanation: In my capacity of a ProZ moderator, I received quite some e-mails from colleagues who'd appreciate it very much if you could grade the 20 (?), 30 (?), 40 (?) previous answers you were given.
We've noted that you graded only very few answers(2, 3 ?).
KudoZ is indeed about helping out translators, but when help (and in your case: lots of help) is given, the least you could do is showing some appreciation by saying 'thank you', read: grade the answers.
Otherwise, I fear you'll place yourself 'out of the system' (read: only very few will be willing to continue sending you answers).
You surely understand this.
Anyway, please do not hesitate to send me/us your comment.