TheMarket cashback had been revoked for a while already for both shoprewards and kiwiwallet.
Just found that it is active again quietly in shoprewards (2%) but sorry it is still not available for kiwiwallet (https://www.kiwiwallet.co.nz/themarket).
Current coupons are not mentioned as active coupon in shoprewards but I believe you would still get the cashback as I got it before, anyway no harm to order via shoprewards even it is not eligible eventually.
Happy Black Friday shopping with 10% (Hopefully 12%) off in TheMarket.
I personally use https://www.shopback.com.au/themarket-nz for 3% cashback. Shopback also has cashback for amazon AU, booking.com, apple, aliexpress etc. Would recommend!