Can maximum attendance ever change?

In the editor for every team there is a maximum attendance set.

Can this value ever change?

If so does it increase when reputation increases or when a new stadium is built?

Thanks

I think it changes in-line with the average attendance (along with the minimum). Your best option is to check a middling team on the editor and auto run a season with them and then check the situation with FMRTE, unless you're unlucky enough that they do exactly as expected and get no rep rise or fall you should see a achange.