How long does it usually take for a buyer to rate the purchase?

I managed to sell 2 codes on gameflip but both of the buyers did not rate the codes yet (They were obviously unused). It was set to autodelivery.

One of them does not reply at all and the other one simply said “thank you”.

How hard can it be to rate right after you redeem the code? I mean it is directly below it…

Hello! Buyers have 3 days to rate. If they don’t do it, the auto rate system will take place and will rate for him. After that, you may rate the transaction to receive your money.

Thanks!