Just checked the surveys credits I received yesterday, and found that I was credited 200 points for survey number 163335. The survey supposed to be for 500 points and I'm sure it was for 500 in the Waiting credits. Also found the e-mail (from Nov. 22) and it was for 500 points there too. Sent e-mail to support.
Go and check yours if you remember completed this survey (the surveys for 500 points didn't come every day, so we can remember them easy).
Also one credit for 200 points was disapeared from the Waiting credits and it wasn't credited. This happened to me before, sent e-mail, received an answer more than 1 month later, that the credit dissapeared because it will be credited soon. Finally, received the lost credit 2 months after dissapearing. Figure it out :shrug:

