What is Guilt Bonus Campagin?
Temporarily increases the Guilt/Special Attack Bonus range (but not the Guilt Tier!) you can roll~
For example, guilting a Tier 3 medal normally gets you a % between 40-100%, but during a Guilt Bonus Campaign, you'll roll a Guilt value between 70-100%.
I've edited in an explanation above, too, if that helps ^^;