The WeTab / Infinity team has responded to this [1] (in Chinese). Basically, they argue that:

- The Clean Master extension has long been sold, and the malicious updated was not pushed by them.

- The other two mentioned extensions are not at all malicious. They collect use info for extension opt-out-able features and analytics (using Google Analytics and Baidu Analytics).

- They are communicating with the extension stores to restore their extension.

Let's hope it's not an AI company making AI-generated accusations.

[1] https://mp.weixin.qq.com/s/E8YQLWZFM2J7r5DZNSl47w & https://www.v2ex.com/t/1176484