They are stealing data that can be (and is, often) used to track you across the entire internet. many social media platforms (again, especially tiktok) use this data to straight up manipulate people into spending more time on their platform and having views that align with the interests of the company. this is especially bad if the interests of the company are really the interests of an authoritarian government that is blatantly hostile to other countries unprovoked.
very beta rn, but its no worse than TikTok functionally and doesn’t have any Chinese spyware