Now I think it might actually be better to have the singular as the main tag because a single match seems more common than multiple.
Necroing this because I had the exact same thought. I find it odd that this tag uses the plural form, unlike most object tags, which are typically singular. The term "matchstick" is already used in holding_matchstick, so I don't see why it can't be used for the base tag as well. Might as well include implications for the holding tag too.