These big ISPs provide their users with spam-flagging tools. If Latest Mailing Database enough people flag your newsletter as spam, these providers will block EVERYTHING you send. That means that no one from AOL will be able to receive newsletters, emails, or Latest Mailing Database anything else from you.
And, unlike the spam legislation, these ISP providers monitor Latest Mailing Database spam very closely because they want to keep their Latest Mailing Database subscribers happy. And if they do decide to block you, there is no warning; they can just flip the switch. Once blocked, it is also extremely difficult to get unblocked, and you must provide the ISP with evidence that you are not in fact a spammer.
Monetizing Your List Deciding to offer access to your subscriber Latest Mailing Database base to someone else, or sell your list of subscribers, is a slippery slope that will take you down a path of consumerism that may or may not hurt your business. Selling your list to another vendor may result in customer dissatisfaction, spam issues, and Latest Mailing Database most importantly, loss of subscribers. I wouldn't do it.