Of course the reverse can also true... the scalp can be set up to profit ONLY if the favorite wins.......Actually (to be accurate) you only win money if the dog wins - if the favorite wins you break even.
wil I understand you may not seek them out... But if a TEN cent scalp appears in front of your eyes at the same time, say at OLY/PINNY & you happen to be well funded at both....No - I handcap and bet my own stuff.