Originally Posted by
oldsmoboi
to piggyback on the OP's question, What is considered a "good" earning of miles per dollar in a mileage run? I mean, cheaper is always better, but what is the "line" that makes it not worth while?
Every person will have a different answer. Generally speaking >5cpm is not considered mileage-run-worthy and <3cpm is considered a really good deal.
For a recent discussion on this very topic see the following thread:
your-mr-cpm-bite-range