It’s a little strange. Maybe they have developed a relationship with Auckland FC which benefits both parties?
Nah, there is no relationship between the two whatsoever. Quite frosty between both clubs apparently.
Probably quite a smart play from ACFC though. Despite all the expenses apparently being covered by FIFA for this league, contracting a squad will likely run the clubs involved 100's of thousands of $$$. Big ask to recoup that through sponsorship, and will ultimately lead to backers/owners having to dip into their back pockets to prop up a setup.