Groupon's email list value depends on its size and engagement. Groupon has millions of active subscribers worldwide. You can estimate the worth by considering their revenue and marketing power. Companies like Groupon rely heavily on email marketing for deals and promotions. You can expect their list to be highly valuable due to its targeted nature. You may need to research their financial reports for more details. You cannot buy or access their email list directly. You must focus on building your own valuable email list instead of relying on others' data.