Starting today, Safe Browsing will begin to classify these types of sites as “Repeat Offenders.” With regards to Safe Browsing-related policies, Repeat Offenders are websites that repeatedly switch between compliant and policy-violating behavior for the purpose of having a successful review and having warnings removed. Please note that websites that are hacked will not be classified as Repeat Offenders; only sites that purposefully post harmful content will be subject to the policy.Once Safe Browsing has determined that a site is a Repeat Offender, the webmaster will be unable to request additional reviews via the Search Console for 30 days, and warnings will continue to show to users. When a site is established as a Repeat Offender, the webmaster will be notified via email to their registered Search Console email address.

Source: Google Online Security Blog: Protecting users from repeatedly dangerous sites