Ask HN: Scam IT Consulting Firms?

I follow the classifieds in my local newspaper (Raleigh, NC in the US). There have been several IT consulting firms (in past several months) that have legit looking job postings offhand, but when I go to their websites they are quite bad. One you had to snail mail resume (and website had various levels of neglect), today one had a http website and lists a shared office space as mailing address.

Are these some type of scam? I cannot figure out the scam though exactly. All I can guess is some type of shell company (to maybe spread out H1Bs and avoid dependency status?)

Or I am just overestimating the level of competence people whom outsource IT and they have legitimate contracts. The websites smell like Nigerian scam email level bad to me, so I just have a hard time seeing that someone looks at the website and actually pays the group to do anything related to IT.