So you're inferring that 7pm sunday time slots will actually increase attendance at other time slots?
I think some people may do that yeah, if they say they only ever go to one or two games specifically a season, theyre likely to just choose a night with a better time for them. Nothing lost, nothing gained.
However I imagine a lot also decide on an individual basis. In which case, they'd see the time as inconvenient and say 'ah well maybe I'll go another time, theyre on 9 more times this year. In which case that is a loss. When they make a comparison with a side that plays here once every 10 years however, they'll think its inconvenient, but then weigh it up with the fact it'll be another 10 years until they can see them again - if ever.