• All ads have to be relevant to ecological restoration in New Zealand.
• The advertisers need to be reputable - good services or products.
• The ads need to be useful to someone visiting the website.
• The ads need to be small so they don't increase download times.
• The program need to be quick and simple for a New Zealand advertiser to use.
• The ads need to appear on the correct parts of the website.
• The ads need to generate income to pay for the website hosting costs (power bandwidth, repairs).
• The whole process needs to be automated.

Do you know of other issues?