Because the rule is 3 months of inactivity by the developer, but 18 months without an update to the title. If strictly going by the OP, that means that an abandoned tag wouldn't be added until at least 22 February 2024. However, if the staff decides that it's not the update added to the F95 site, but instead the actual last update - it would mean even longer. That's because it continues to get updates, but those few people subscribing aren't sharing their copies here.
Whether we like it or not, it's going to be awhile - even though there is nothing here for people to actually be concerned with wasting their bandwidth or time to look at.
No, a spam tag isn't needed. Also, spam is a completely different term.
However, every time someone posts in this thread to complain about the title not going anywhere, it brings it to the top of the news feed and forum listing - bringing attention to the thread. If people stopped posting their complaints in this thread, the thread would be lost 15 pages back.