I'm not entirely sure what the opposite of a "Growth Hack" is, but we've grown ExpeditedSSL - https://www.expeditedssl.com - to hundreds of paying customers by doing the hard work of providing really awesome support.
We started out fairly rocky, but over the course of the last six months and hundreds upon hundreds of support emails we've learned a ton about how to provide support in a scalable way that makes our customers really happy.
To help others get going we documented all the lessons and tactics we've found to work the best, please check it out:
https://www.expeditedssl.com/pages/how-we-grew-our-startup-by-providing-awesome-support
