Obviously paying them for the wasted time the LEO have when they finally respond....By the time they actually get there, since burglar alarms are a "low priority" call, the burglars have already got what they came for and split probably more than an hour ago....
Do yourselves a favor....DITCH the "monthly monitored alarm" scams and put that money into a good quality set of surveillance cameras that will be able to record those burglars in action so when the police finally get there in 3 or 5 hours they'll have a "birds-eye" view of what the suspects look like and what they did....Video will even be useful as "evidence" should it be needed in court....