In my experience, NOPE.
I would assume you are thinking about sending traffic to ad-sense or some other offers and yeah it might work out for some for a while. But to put it straight , most networks realize most of the traffic (not all) without proper referral (Blank Ref.) is usually shady and hence will start monitoring you closely. And if you traffic doesn't convert well enough for them , you might end up loosing.
Remember , I don't speak for everyone else, these are just my 2 Cents from my personal experience.
Hope that helps.
-DS