Ad Credits are simple.

You earn an ad credit when an article you wrote gets viewed by someone outside your self-described service area and professionals within the L4 networks get an ad shown.

You use up an ad credit when a reader from your area happens to be reading an article written by another L4 member who is not in your area.

If you run out of ad credits you can buy more.  This feature is not active yet on the site, but contact us if you wish to purchase more ad credits.