[natdempk]

You could try engaging accounts on twitter that post content similar to yours. Accounts that basically post content around a theme like History in Pictures or Modern Day Stoic. No guarantees these accounts would buy anything, but there might be twitter account managers out there looking for a way to easily maintain a site alongside their twitter account.

Definitely announce this service to your existing userbase. I'm sure people there have ideas for similar sites, but lack the ability to execute on them currently. You could show them how easy it can be. Referrals could be good if its not too much of a hassle to setup, but there are probably more valuable ways to get signups.

[desouzt]

Thanks. That first suggestion in particular is a great idea. We'll get straight on that!