Of course, if you're going the paid ad route, you could also use Facebook and Google re-targeting to keep that awareness and interest level high. For example, if you've ever noticed after leaving a particular website, that you begin to see their ad everywhere, there's a particular reason for that. Especially if they've already entered your sales funnel, this is a very powerful way to get them to act.
At this time, Leadpages does not provide the IP addresses of subscribers. Please note, if you're looking to identify the geographical location of your subscribers, it's best to set up a field on your form that asks for their location, as IP addresses are not the most accurate indicator for a subscribers residence. Furthermore, filtering by IP addresses when deciding who to send subsequent emails to could incorrectly include subscribers of a location not intended to be left out.