@GLane yes there is! There are tons of great apps these days that allow users to subscribe and follow on a lineup of channels and list(s) that you desire. I am currently building one for a client using SweetWidget, but there are so many out there. I can't speak to whether this or a competing app would provide every single item in your list of 1-5 but it likely can or at least most of it! Contests are a great way to get attention and build your followers and list subscribers. Keep in mind what the prize and offering would be and have it synchronize with your brand voice and value proposition. And if you are a company that it's difficult to discern (home services, legal office, etc) you can go with a local or regional product giveaway to shine light on other businesses in the area and draw their support!
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