A company/organization joining OpenID foundation will have the following benefits and the annual membership fee varies from $100 to $10000.
-Use the OpenID Foundation Member logo on your company website, blog, and other marketing materials
-Display your corporate logo/name on the OpenID Foundation website and promotional materials
-Propose, lead, and participate in OpenID technical and marketing work groups
-Vote on ratification of OpenID specifications and recommendations
-Be eligible for inclusion in OpenID Foundation press releases and industry events
-Opportunity to meet, exchange views, collaborate with peer organizations in innovative, open source efforts