Not really. Email addresses that belong to an "opt in" list have opted to receive emails from, say, the list-purchasing company -- not your company. Even if the opt-in process includes language like, "Opt in to receive information from us, or offers from other companies we think you might enjoy," the fact is the recipient doesn't recall having a prior relationship with you, specifically. This makes it highly likely for the recipients to mark you as "spam" when you arrive in their inboxes. Hey, if they don't recognize you or remember opting in to communications from you ... can you blame them?
While email marketing ROI is higher than that of social media, you’d be remiss if you’re not combining both. While keeping your brand top of mind is an obvious benefit of using email and social, the crucial data you can derive from both enables you to hyper-personalize your messaging and content. This makes integrating both an integral part of your social media strategy and vice versa.