Until recently, say the last decade or so, the only broadbill caught in NZ were occasional flukes taken on baits trolled or drifted for marlin. The odd other broadbill sighting was made when fishermen targeting deepwater species such as NZ Bass, Bluenose and hapuku (all in waters of around 1,000ft or so) had smaller fish or baits taken by broadbill. A very rare occurrence, and not at all considered a viable recreational fishery.
It was only when the commercial fleets of tuna longliners discovered the sheer numbers of available fish out there that recreational fishermen decided some species specific targeting would be a good idea. My first experiences with broadbill fishing were aboard the well known charter boat