The rules are pretty simple. MD Banner accepts any websites except the following types:

Nothing Illegal
No Porn
No Fraud
No Hacking
No Hate

The free credits will be given out after the link has been used for a predetermined number of times(10). This discourages cheating and ensures that everyone gets their fair share of exposure.

The software used in this exchange is designed to eliminate cheating, and any members caught cheating will be blacklisted from the site with no warning.

The Exchange reserves the right to remove any member for any reason.
So there.