What OpenID providers can do with those customers when they get them is less clear. They will clearly have lots of data about the services that you are using, which they may be able to exploit (worth checking what the T&Cs say).

I don’t think OpenID providers will have much opportunity to extract “access” charges from services that their customers connect to, as some business models have sought to do. Nor do I think they have any particular advantages in trying to sell their customers other services.

It’s possible these businesses may be funded by advertising because it’s often the case that you need to be logged into your openid provider when accessing services, or it certainly seems to be the case with Livejournal who have operated OpenId services for some time. Hence, I need to keep going back to the livejournal site.

But I still wonder what’s the business model.