Under #2, be careful with popups or modals that cover other interactions, Google will now penalize this kind of activity on mobile. I suspect we’ll now see persistent banner style replacements on mobile (a strip across the top of the site that doesn’t scroll off the page or disappear until you close it or sufficient time has elapsed without interaction.)
In response to “bogus” email subscribers, I will tell you why it is done… because I do it myself. When I am forced to put in my email information just to get some free information, it irritates me. The reason it irritates me is because, I deal with many companies in my business, I can not afford the time to keep sifting through my inbox to delete 50 emails from a company that I just wanted a little information from. Email marketing optin is great, but keep in mind – not everyone wants the bombarding of emails after-the-fact.
First of all you need to sign up for a free account at MailChimp. Here is the signup link (Aff. link). Once you have signed up, and logged into MailChimp dashboard, you will be seeing a screen similar to this, and click on create a list. The good thing about MailChimp dashboard is, it’s interactive, so you will not find any issues with getting started with it.
Like I said, most ESP (email service providers) have the capability of creating automated email workflows. So, instead of getting an email subscriber and initially sending them one or two emails, before getting distracted and forgetting all about them, you can be sure that you have emails sent to them over the course of a few days, weeks, months etc. with email automation.
After you have entered your "List Name" you will need to enter a "List Description." Here is where you will describe the kind of information you'll be sending from this list. There is a 400 character limit for the "List Description." Subscribers will see your "List Description" on the unsubscribe page if they ever go to unsubscribe from your list. Once you are done entering your "List Description" click the "Next Step" button.