Extension of MIT License for SaaS?

Basically I was thinking about adding this to MIT:

    If your version of the Software supports interaction with it remotely through a computer network, the above
    copyright notice and this permission notice shall be accessible to all users.

What I want to say is, that if the software is used in SaaS, then the copyright notice should be included in some about/legal/credits page/panel.

What do you think?

Given the crowd on HN, I'd really love some feedback from people in the know on that. Please share what you know!