Its doesn't matter PR, they've already stated that they are playing at Suncorp fulltime, you basing the assumption that only REDCLIFFEs townsfolk or those of moreton bay will attend..
That would only be half or a third of the home crowd, brisbane has 2.5 million population, they only need to service 1% of that to get bums on seats and memberships to have consistent crowds, yes they won't do that at dolphin stadium, but theyll only train there, and theyll do it at Suncorp easy, and play the "manlys" of the league at sunshine coast, to pack out the lower crowd fixtures, thus save rent money instead of using Suncorp.
The jets will be the same distance and same issues, ipswich is 4kms away, Redcliffe closer at 39kms from suncorp
Easts will have more of an issue with both branding and effectively cutting the broncos territory, sponsorship and crowds in half, where as the jets and dolphins won't encroach on the broncos as much as east will