I still cannot figure it out. I see the tid: in some of the topics, but it's got the topic id in it, not a tag id. I'll buy someone a $100 Amazon (or other) gift card (or $100 worth of ETH/BTC) if they release on github a bulk tagging plugin that allows me to add one or multiple tags to all topics/posts in a category. 🙂 I know it's not much, but I'm not generating any revenue off this site and have limited budget.