Popular Sport's Merchandising Stores in NZ

Hi all,
Here at www.kiwiwallet.co.nz, we are looking to add sport's merchandising stores into our growing list of retailers to offer cashback https://www.kiwiwallet.co.nz/Retailer/GetAll. In your opinion which international and national clubs either football, cricket, rugby, NFL etc are popular and people buy their merchandise stuff in New Zealand?

Looking forward for your feedback.