However, it is not really surprising, that the tag is in practice also used for questions concerning various types of penalty cards (such as yellow card and red card in football). (That is the meaning I would guess for the tag just by its name - without looking at the tag-info. In fact, I have recently edited the tag into one question about yellow cards - only later I have noticed my mistake and removed the tag.)
Questions. Should there be a separate tag for penalty cards (yellow cards, red cards)? Should we keep the current scope of the tag (cards) - only for collectibles?
The tag (cards) was probably created around the time of this discussion: Sports Collectibles - On Topic for Sports SE? (Both on the main site and in chat, the oldest question I was able to find with this tag are from July 2013.)
At the moment, there are three questions tagged cards. One of them about penalty card, two of them about collectibles. There are three more questions about penalty cards where this tag was used by the OP, but it was later removed: https://sports.stackexchange.com/posts/16766/revisions, https://sports.stackexchange.com/posts/13657/revisions, https://sports.stackexchange.com/posts/5112/revisions.
Questions which had this tag in the past can be found using SEDE:
- All posts which had this tag at some point
- Deleted questions which had this tag at the time of deletion
- Posts which had this tag - including the editor who added it
- Posts where the tag was removed - including the editor who removed it