The additional sentence clarifies what the account will be doing in not voting for witnesses.

I'm still stuck on:

... unless said member is a witness themselves and are speaking from a non-Foundation standpoint.

Why do they have to be a witness themselves?

Support for individual witnesses should never be implied, directly or indirectly, by any Foundation account or active board member unless said member is speaking from a non-Foundation standpoint.

e.g. Any board member can speak positively or negatively (by votes or text) towards a witness as long as they aren't using the foundation account?

Good luck on this! :D