Neutral in this license appears to be in a gray area. The initial phrase "for Good, not Evil" presents a dichotomy. Now, this addendum allows Evil as well. So the license has never explicitly addressed this issue, it seems like it would depend on what else the license says.

Assuming that the license this is added to is a generally permissive license, I would assume that neutral acts are implicitly allowed and were probably not enjoined by "for Good, not Evil" as that clause would simply not have applied.

But I am not a lawyer.

I find it amusing that he only licensed it to IBM and minions for small-e evil, not big-E Evil.