I can’t seem to delete any of my old comments, so let me backtrack on my previous negativity here.
Obviously I was very frustrated, and then panicked when my site crashed. It seems as if the trouble was due to a conflict between the email verification plugin and another plugin.
I will give credit where it is due. Pablo/WPFactory did try very hard to resolve my issues and get their plugin to work for me. Going so far as to quickly build a compatibility piece to try to make it work.
While I won’t be using ANY verification plugin right now, due more to the whole process rather than a plugin, it should not dissuade anyone from considering WPFactory if this is something YOU need.