I have 1M+ emails but 30% no longer valid.
if you send me unsolicited email, i will actively boycott your company. not just for myself, but anyone and anywhere i have influence. i have significant influence in my very large companies product choices, and unsolicited pandering is the one perfect way to get me to go out of my way to ensure that our business has nothing to do with you, ever.
if you are indexed on google (1st page, 10th page, it doesn't matter), and it describes your thing, you're done. spend your money elsewhere. the rest is a useless gimmick.