I had it linked from previous season!
WATERSCOURT Card for You!
To thank you for having played and tested between the end of season 6 until now, we will give 1 WATERSCOURT card to each registered player, who have successfully finished at least one level and have linked their Counterparty wallet to their SoG account. If you have not linked your wallet to your game account yet, you have until September 25th, midnight CEST to do so. Then we will distribute the rewards.
So the only thing that could have gone wrong may be that when they were sent out you didn't finish at least one level seen the stats were reset?
I believe things were manually double checked with info they had available.
The card was not for participating in season 7 but
for having played and tested between the end of season 6 until now...
I suggest to reach out to Marketa on Slack, explain the above, provide your linked address and see what she says.
Mind you the team will be really busy preparing for the soft launch, so don't expect a quick answer, be patient.