At least one local news outlet has covered WIN’s changes in Griffith, albeit focusing on the loss of Sky News Regional. Their take on the Seven services becoming a dirty feed from Wagga is “local businesses can no longer book advertising on Channel Seven through WIN” which, as someone who understands what’s happened, seems like an odd way of describing it, but to the general public and to local advertisers this is probably exactly how they look at it.
The article doesn’t mention that those advertisers could probably buy the same airtime by talking to Seven in Wagga, but does mention one local advertiser’s concerns that similar out-of-area businesses are now having their ads broadcast to his customers, causing him more competition. Given how local advertising tends to end up on statewide filler lists anyway, I’m not convinced this is a new concern, but can accept the change would be resulting in an increased amount of out-of-area advertising being aired.