What you can do to prevent large backups is ensure that when Time Machine runs, all of your folders (or the largest of them), are in the same locked state as they were when the previous backup happened. This is explained in the Tips forum for optimizing Espionage's backups.If you don't want to do that, then the next version should allow you to disable backups completely for a specified folder, and then you can use Espionage's built-in backups to back it up.
If you want to prevent the large backups than ensure that whenever you creating the backup and the time machine runs, the largest of the folder from your backup, must be in the same state and also must be locked as they were in the previous backup happened.
If you want to prevent the large backups than ensure that whenever you creating the backup and the time machine runs, the largest of the folder from your backup, must be in the same state and also must be locked as they were in the previous backup happened.