On the 6th of March we noticed huge spikes in the Arma server logs during first main. About 400000 messages/minute, normally there are only about 30000 messages/day on average. We traced the source of the issue to the FFAA AI that was being used in the mission, specifically the groups. Because of this we won't allow the use of FFAA AI anymore in any mission.
If FFAA ever releases an update to fix the issue, the ban will be lifted.