I read your project:
My name is Curtis and I have a virtual-dedicated server with up to 25,000 email relays per day. Although experienced in SEO / web design, I think that the quickest and most effective way to get a lot of people to your site is to do a targeted, bulk email campaign.
I can send 50,000 emails to a custom generated database that is only for your site and I'll send from 3 unique IP addresses AND use a .chron config. So all emails are delivered.
I'll send emails in batches of 500, and space sending so to send 50,000 will take approximately 16 hours of work and can be finished in 2 days.