I also just noticed in the article:
TikTok urged its users to protest the bill, sending a notification that said, "Congress is planning a total ban of TikTok... Let Congress know what TikTok means to you and tell them to vote NO."
Also from a BBC article about the same thing:
Earlier, users of the app had received a notification urging them to act to "stop a TikTok shutdown."
So they were literally sending out misleading notifications (because a forced sale is not a total ban), and then the users wrote to Congress based on that...
The probability that they will sell seems really high to me, as the same thing almost happened back in 2020.