I think this phenomenon is mainly about UX and IxD. If there's only one route presented to the user .. many of the users are likely to choose the single route

I think this phenomenon is mainly about UX and IxD. If there's only one route presented to the user .. many of the users are likely to choose the single route presented to them. Perhaps this is a trite point, but I'd argue that it's a good example of how presentation of advertising should be included as a key part of any UX and IxD strategy.