When you apply for a free DV SSL certificate, the following message is displayed:
Due to CA's anti-phishing mechanism, sensitive words contained in domain names, such as "bank" and "pay", can cause security review failure. Specific sensitive words are defined by the CA. Some less commonly used root domain names may also result in review failure. For example, root domain names suffixed with .pw, such as
www.qcloud.pw, will not pass the review.