To answer this question:
if you aren’t yet a member of Giving What We Can, would you join if this change was made?
I’m not a member, but I’ve been seriously considering joining for a while, and probably wouldn’t join if this change was made, as a large part of the appeal of publicly joining GWWC is being part of a community focused on global poverty, rather than of singularitarians, rationalists and the like (who have their own communities).
I find myself really quite strongly against this. I’ll try to find the time to compose a comment explaining why, but for now I’ll simply state this as a data point.