The ironic part of the 190/700 redeployment is that almost all
the buses that became WLDEP SP now have ads with the exception of
198Z. Even 119C,121U and 122S have ads.
I guess you would have known by now that unlike SBST, SMRT
doesn't care much about ad contracts for a particular service~ Just
look at the number of O405s with valid or even new ads running
around everyday as SPs still.
Think to them, as long as that bus with ad is running on a
service each day, that bus can be SP and do as many random services
as long as they want it to.