Is Effort done Proportional to Traffic + Sales?
A JV deal or adswap could be quick to set up and get get a lot of traffic or subscribers.
but there are other methods where you put alot of effort into and can produce not as much traffic as proportional to the amount of work you put in.
Many factors also play a part in this, keyword analysis, competition, how much effort you put into each stage of the method, outsourced work, etc.
But just somthing I thought of a few times.