The codes were available until Sunday - this was announced on the Stream in which they were given. They were given as a reward to people who were in the Pride Stream as a thank you.
The rewards for the surveys to those who filled them in the correct amount of times and put the correct Cloud ID etc, were sent out a little while ago.
No it doesn't mean that, because Grades are not used for matchmaking at all....Grades are a reflection of time put into reaching the highest grade that season, that's it.
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