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I found one of our competitors developed URLs for every state in the US. They linked all these sites back to their site and they are ranking very high for each of these states.

Here are 2 examples

http://metalbuildingsmississippi.com/ #1 for "metal buildins mississippi"

http://metalbuildingsoklahoma.com/ #3 for "metal buildings oklahoma"

these pages don't even have a PR.

Would you recommend doing the same with my site, writing unique content for each URL and building links?

Hello, one of my competitors built all these blogs and pointed them to their main site.. Is this white hat?

http://steelbuildingsblog.org/  PR3

http://metal-church-buildings.net/ PR2

http://commercial-metal-buildings.org/ PR2

http://metalandsteelbuildings.net/ PR1

http://steel-storage-buildings.org/ PR2

http://texas-steel-buildings.net/ PR2

http://steel-metal-buildings.org/ PR3

http://metal-buildingstore.com/ PR2

http://metalagriculturalbuildings.net/ PR3

Also I am looking at my links vs. theirs and they have a much higher point score for links... But  the company I am doing SEO for has most of same quality links. Can this be the reason they have an edge?

What strategy is most commonly used to guest post on blogs?