There's generally no one doing the work basically. A gym I went to had notoriously bad competitions and advertising. It was never the "last memberships available" and there wasn't actually "10 days left" the counter just changed back on the final day. No one ever got the prizes either, they just never announced a winner, and a new competition started the same day. People still signed up by the hundreds.

Hundereds of formal complaints by people from the gym to the ombudsman and consumer affairs over more than five years amounted to literally nothing. They still do everything they used to.

Even more seriously, they didn't pay their employees superannuation, and it took years to even start the process of sorting that out.

As these car competitions are run by private businesses and not the car manufacturers my guess is they are simply too small of a fish to go after.

Now, just last week that same gym was implicated in a drug trafficking ring. But that's a different department of law enforcement...