>>75883342Real answer
China very coincidentally
seriously, it happened at almost the same exact time so I doubt coco was the reason put laws into place in late 2020 that required any content creators on BiliBili to have their accounts registered with legal ID into a database.
Naturally Cover didnt feel like that much risk to their talents was a worthwhile investment, and they were exactly right. China has introduced even MORE AND WORSE anti/vtuber privacy laws ever since.