LifeinAsia - 5:42 pm on Jul 28, 2010 (gmt 0)
Some may look at how long the site has been live. They may look at 3rd party traffic reporting resources (e.g., Alexa) to get an idea of if you are inflating your traffic. They may look at home many other sites are linking to your site. They may look at how many of your site's pages are indexed in Google.
None of these are hard and fast "requirements" but may be looked at by program managers before accepting sites.
Have you contacted the program to ask why you were rejected? If they give you a specific reason, that more than anything anyone else may guess, will tell you what you want to know.