No one gives a shit if your data is collected. I (and presumably you) are not worthwhile targets. The issue is the Chinese government using social media apps based in China to feed anti-US/pro-Chinese propaganda. I’d bet $100 that if (mostly likely when) China invades Taiwan all Chinese owned social media outlets will instantly feature lots of anti-Taiwan content in every country that they may turn for help to try and turn the US population’s opinion more favorable to China’s side.
I feel like I already answered that in the last paragraph.
It’s litterally anything that whitewashes anything the CCP does. Maybe it’s justification for island building in the South China Sea, framing international right of way passages through the same body of water as border incursions, trying to reduce support for weapon sales to Taiwain, or trying to reduce allied responses to an invasion of Taiwan. It could also just be spreading general unrest.