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Target customers: users of subscription WAF 3.0 instances Features released: 1. Target customers: users of subscription WAF 3.0 instances 2. Feature description: The burstable QPS (pay-as-you-go) feature is suitable for scenarios in which expected or unexpected traffic spikes occur, such as traffic spikes during promotional events. In these scenarios, peak service traffic may exceed the sum of the QPS specifications that are supported by your Web Application Firewall (WAF) edition and the extended QPS specifications that you purchased. If you enable the burstable QPS (pay-as-you-go) feature, you are charged for the usage of excess QPS resources. The feature helps ensure service continuity and prevents your domain names from being added to a sandbox when peak service traffic exceeds the current QPS specifications.