I don't know what kind of ammounts these tickets are for but generally I would say that the cost of running operations is always higher than the revenue you can get from tickets. There are just so much costs connected to whatever you order tax funded organisations to do and the money coming into the system from tickets do not amount to anything at all generally travelling through the system of administration and courts and what have you.
However it is natrually very possible that they decided to up their precense in your area for a period for some reason. That's just the way law enforcement operates.

Be careful for a while.

Puffzter