I can't speak for all the programs (my impression of the programs), but generally they look at all portions of your application provided that you meet certain minimums. Since, the GRE is optional, it does not make sense for them to signal that it does not matter and then use it to cull applicants. Maybe some programs do this, but usually programs are balanced with how they look at the different parts of your application. They would look at your statement, recommendations, grades, and they would put more stock into these as the GRE is optional. In other words, I think that a cross applicant comparison between an applicant that submitted the GRE and an applicant that did not would mostly focus on the non-GRE portion of your application. I am sure that you have sufficiently distinguished yourself through those parts of your application, so don't worry about not including the GRE.