Multiple Safelist Blasters/Mailers
For members that want to pay to blast their messages to thousands, and in some cases millions of Safelist members, here are a number of blasters that I have used in the past. Keep in mind, these all cost money. Some a one-time fee and others a monthly fee.
Yahtoogle - PlanetBlaster - Click and Mail
Set & Forget Safelist Mailing
Entirely automated, this is an excellent Safelist mailer. I personally use this mailer to send thousands of messages automatically throughout each week. It offers 3 membership levels with the most expensive being $9.99 per month. I personally receive 3 to 10 new referrals a week from this mailer alone. It's well worth the investment in my opinion.
Here's a site that rates the top ad blasters. You can sign up directly from this website.
If you would like to purchase leads, here's a source with reasonable prices and a good reputation.