so, two rules govern this functionality for the jam; if the map bleeds onto the second half of a quest or the text bleeds onto the first half, that's not in accordance with how a printed quest should look. So it depends on how much the scale versus the content tampers with this narrow window of balance.
If it does render half and half, though, and it isn't modified by any pdf tools, then I see it as permissible to change the scale during the export process only...if only because Squidge suggested this trick to participants to begin with.