It's also TIGHTLY controlled, with people complaining on Twitter and elsewhere that their posts are under 48 hour review before posting. The rules are also quite strict around LGBT issues etc, and not in favor.

Most of all though it's just a very silly protest, given that the "tiktok ban bill" is really a "hostile foreign-power controlled platform divestment bill" so Xiaohongshu will just be next on the block in the unlikely event that it becomes popular.