I’m sorry but I don’t see the whole point of this thread
You mean you all scrutinise every single bus and make a list of it
to see which service is its main and which service it does a
cameo..? 
And what do you get out of it? 
sorry just asking out of curiosity 
er
buses that are normally doing their "home" service like mines ,
TIB537B on 106 if they run on maybe the same depot service say,
KJDEP 77 or 189, it's called a cameo as it's supposed to run on 106
but it does other services today.
Like the most recent special cameo involving a 1 million dollar
bus
SBS9889U did 99 last month (BBDEP 166) which normally, it'll
either do 147 or 166.

Maybe you'll like to divert your questions to the Questions
thread on the sticky.