According to a report by Peter Williams [1], the American real estate industry has decided to adopt OpenID Connect for Web API authentication. I didn't know this, but the real estate industry is the largest sector in the United States in terms of GDP. According to the 2014 base year data from the Bureau of Economic Analysis of the U.S. Department of Commerce, the real estate industry is the largest sector in the United States in terms of GDP.
Further display US real estate industry adopts OpenID Connect for web API authentication