Yes, we too are a SiteBuilder account. I would urge you to file a support ticket with a complaint. I have received feedback that they are looking into requests to delay/stay this decision. I fed them the many reasons why CloudFlare is a necessity for our site, and how we're an Ecommerce business. Taking away CF proxy services will be slowing my site down, and introducing opportunities for DOS/botnet attacks, and other issues. You should take a strong stance, and encourage as many other site admins as you know to do the same. NetSuite can't provide the services CF does, and there's no real technical reason for them to "block" traffic because of CloudFlare or any other domain proxy service. Keep me posted as to how it goes on your side!