Anyone know the real difference between using an advertising network or just parking domains? I've looked at several ad networks like www.advertisingnetworks.org & www.rubiconproject.com and they seem very similiar to parking domains.
Parked pages are more text based links, while advertising networks provide template based mini-sites stuffed with advertisements. You'll probably get better conversions with a mini-blog or partially developed site. Eventually search engines figure out the pages are parked and downgrades them, so why not slowing develop a niche site instead.
Thanks for the comments. I have tried niche sites, mini sites, full sites, etc., but it is too time consuming when you own a large # of sites. Need better roi for the work involved.