Querying Elizabeth May's Job

Political Staples posited the best question regarding the recent Elizabeth May/Stephane Dion democracy-fest:

Is the Green Party a lobby group by other means...?

That is the question? And if they are, should they not lose their 75% tax credit status as a political party?

If you have been volunteering, donating to the Greens, as a political party, I can't imagine how let down you must be this week.