Hi lead gen pros, i'm building learning loop - the peer group of tech CEOs. How can we best use the emails we got from third party tools? they haven't opted in to receive an email from us. potential solutions: 1. get them to opt in. send them an email and send something valuable "you're getting this email because we scrapped Crunchbase for SEA based founders' email. we didn't mean to spam. we just want to share maximally. click here if this caught you off guard and not hear from us" 2. reach out to them on LinkedIn thoughts?