I would bet that most people use WeChat for it's social stuff (IMing or doing 'timeline' stuff) apart from the "novelty" stuff like the ones listed.
If we think of WeChat as Instagram, FB and IM all in one where those aren't the "main apps" for just that, I think 30% seems extremely low.
Obviously I am not Chinese, nor do I live there. And my only experience with WeChat is a couple of months in Malaysia (where it is the main client).
Where I live LINE is the big app, it includes similar stuff like paying etc but I never saw/heard of anyone using them. It is mainly IMing and using the timeline. But we've got FB/IG as well so people use those. But I still think LINE have more than 30% of the peoples attention based on what I see.