Sponsored Pics.

One email per week sent is an ad (on a random day). Build up as much data about each user as you can which you can then offer up to advertisers. E.g. Email all women who like jeans with a sponsored pic.

$lowXX to remove ads.

Also offer backup service for small additional fee.

Partner with a service like blurb to send Instagram photo books to users of their old pics. Perhaps suggest the images that should be used in a book?

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