Well, if that the case, I would disagree. No one would use a
revenue bus for ONLY advertising purposes.
The main purpose of having Citybuzz (roaming in the city that is)
is to let the tourists to have a good look at the main attractions
at in Singapore town. It provides a tour for tourists who may want
to explore these interesting places again in cheaper fares.
However, perhaps such demand does not really fare well in
Singapore, as tourists may have toured those places with their
respective agencies.
What we locals can do with Citybuzz is to use them as a form of
links from one place to another. If you don't mind the fare of S$1,
it shouldn't be much of a problem.
However, if one minds, why not walk to the place that you want to
if they ae just within a stone's throw away? Treat it as a form of
exercise. 
