Because China is socialist* and President Xi presonally oversees every decision that every company makes, meaning he has access to everyone who has given any of their data to Tencent. As they are the very important main character, China cares immensely what microtransactions they choose to purchase. Which they will use to uh...make more targeted microtransactions!

*When they do something bad. If they do something good it is because China is actually capitalist.