And competition between Google, Facebook, Yahoo, fixed and mobile operators to seize control of the data opportunities of a global and very large customer base in mobile (at least 4 times the size of the fixed line internet population) is impacting on other sectors.
Because the original deployments of IDS were just passive data collectors there was no impact on network performance from adding new signatures so the database grew and grew and the logs IDS generated grew and grew to the point where even a mid-size organization would receive millions of alerts a day.