为什么总是启动不了实例，不是说3个月免费vps的吗？

Your AWS account is blocked due to some reason. Do you know if you are trying to access a suspended account? If that's the case, it would be best to open an AWS Support Case to get help with this.

In which region did you receive the error? Can you try us-east-1. If you are getting the same error, please send an email to aws-verification@amazon.com or contact AWS Support as either of the following link: https://support.aws.amazon.com/#/contacts/aws-account-support/ and https://console.aws.amazon.com/support/.