I'm not sure how this'd work with the engine as is. There's something called 'The Default Node' that is displayed by default, when there's no node title or node id specified.

On this site, that happens to be The Monastery Gates. There's one default, as the engine currently stands, for everyone.

It's possible to rewrite a couple of bits of code to use a user setting for the default page, but that's a source code level modification and is totally up to vroom. (It's not complicated, but it does involve touching the engine code.)

(I think the banner impression thing is a non-issue -- the kind of people who would use this change already account for more page views than the rest of the population.)