You say "while ISPs have obvious means of distributing a start page, web hosts do not." While this is not the "classic" definition of a start page it could be construed as a Start Point for my customers when checking email. I think that this is also a Start Point for my hosting customer(s) at various times. This is also a "Start Point" for me every day sooner or later. I think your perception of start page audiences for web hosts is incorrect. The Web Host does not have a "start Point" for his customers customer, only for his customer.