Hello @Axel Ulen,
Thank you for your post. Please see a few remarks below. I hope this can clear up the SCD questions for all of our members as it can be tricky.
1. Please understand that posting in an open forum such as the "Newbie Coin Collecting Questions" section is meant to be addressed by fellow board members. I would like to ask that everyone extends courtesy to one another on the boards. There is an "Ask NGC" section of the boards which is monitored and answered directly by NGC representatives. You may also want to reach out to customer service at service@ngccoin.com. NGC members do not browse the individual threads but I happened to stumble across this one and tried to assist.
2. The SCD Forum originated in 2011 (along with most of the content) and had a few positive responses of late. The NGC census data is tied to an internal numbering system for all coins. Due to the wide variety of attributions for SCD, Tokens and Medals (specifically those graded many years ago) were not always assigned a unique number which meant that they were not displayed in the census. For those older coins, collectors can contact our customer service team with the details, images, etc and request that they be added to the census. In most cases, we are able to honor these requests.
3. The NGC Census is updated every week on Wednesday. Please see the screenshot below for reference. Any coins, with an assigned number, that were shipped through 8/8/20 will now appear on the census. NGC tries to ensure that all coins are included in the census in order to reflect accurate data for our collectors.
Please feel free to contact our team via the methods above if you have any specific items that you wish to add to the census. Thank you.