A similar strategy is used for financial institutions. Many U.S. States have laws limiting the amount of interest a corporation can charge, but Federal law allows corporations to 'import' these laws from their home state. Delaware (amongst others) has relatively lax interest laws, hence the preponderance of [credit card]? companies in the state.
Similar business practice take place in other part of the world. For example, many businesses in Hong Kong are registered in Bermuda for some reasons.