Parking Companies and Ad Networks

[Cataclysmic]

1) Apparently certain names do better with certain parking companies. Is this primarily because:
- The parking page designs from that company generate more clicks from certain industries?
- Different parking companies use different ad networks that have different advertisers and therefore different CPCs?
- Different revshares?
- Some other reason?

If the answer is "all of the above", I'd still like to know what factor(s) are most significant.

A couple related questions:

2) Which ad networks do the parking companies use?

3) Does each parking company generally use just one ad network, or do they use multiple networks?

 

[Fka200]

1) http://www.fka200.com/domain-parking - Not 100% sure what's going on with current feeds, but that's what I had collected from around.

2) Majority use multiple... like for their adult feeds + general advertisement niches.