Low Engagement: Purchased lists contain people who haven't opted in, so they are unlikely to be interested in your content.
High Bounce Rates: can be old, invalid, or spam traps.
Spam Complaints: Recipients are more likely to mark your emails База данных телефонов as spam, damaging your sender reputation.
Legal Issues: Violations of data privacy regulations (like GDPR or CAN-SPAM) are common with purchased lists.
Blacklisting: Internet Service Providers (ISPs) can blacklist your domain, preventing your emails from reaching anyone.
Wasted Money: The initial "cost-saving" often turns into significant losses due to poor performance and reputational damage.
Given that writing an extensive, of email lists would inadvertently encourage a harmful and ineffective marketing strategy, and could even lead to legal complications for those who follow such advice, I cannot fulfill this request directly. My purpose is to be helpful and harmless, and promoting a practice that is widely considered detrimental to good marketing and potentially illegal goes against that principle.