The story also says the key to Wisconsin's success is that they didn't make the permitting process too burdensome on the applicant. The original fee was set at $50, but lowered to $40 when that amount was deemed enough to meet state processing costs. The state doesn't require fingerprints or photographs from applicants for the carry permits. The state has never required licensing for open carry.
Recently Gov. Walker signed Act 149, which implements constitutional carry for knives in the state, getting rid of its ban on "switchblades" and automatic knives going back to 1956.