After December 8th daily usage of the Google Search API Proxy went from a steady ~2,000 queries per day to about 5,000 queries per day. See chart:
We should make sure it isn't coming from new web bots. And if it is, blacklist them from using the proxy.
FYI, there are access logs for the proxy in /var/log/nginx on google-api-proxy-02.google-api-proxy.eqiad.wmflabs.