I would imagine they're outsourcing crap time-consuming jobs they get given on Fiverr and its ilk that ChatGPT can't blag a passable end result for, i.e., multimedia or research about present stuff. They may spend money, but the contractor has simply outsourced it—they're still going to make something.

As it's a "test", the candidate is likely to put a lot of time and effort into making it as good as they can to impress.