We don't have budget for marketing at http://www.cloquo.com so the only way we can do in order to promote our platform is by inviting bloggers, related with our service, to try out what we have develop so far, and we got some good feedback and reviews. Other way we are experimenting is to listen on twitter what kind of upcoming events people is interesting to not miss out and we add some value to them by sharing an alarm to easily activate it and being reminded when time comes. As a Google Mentor told me once, is better to reach first your primary audience instead going mad to be reviewed at big tech media.