For that to happen, you first have to be in violation of your contract like Parler was. They were in violation of the AWS AUP. For many services with millions

For that to happen, you first have to be in violation of your contract like Parler was. They were in violation of the AWS AUP. For many services with millions of users, if you keep your head down, it can take them quite a while to notice you're in violation of your contract... but yes, if you make a bunch of people angry, one of those people is going to notice you're on AWS, pull up the AWS AUP that's published right on their website, see that you're in violation and report you. This should be obvious to everyone. The AUP is not a confidential agreement.. and everyone can see where your server is hosted.