Back in 2010 I had an idea for a service that would allow people to easily create semi-permanent email aliases so that they could give an email address to people and websites without revealing their real email address. These aliases will continue to work indefinitely unless you choose to block them. My brother and I spent a few months building the initial version and launched the website in July 2010. For the first year we had about 50 signups per month, by 2013 this had increased to 1500 and it's currently around 3500 per month. Similarly, our revenue grew consistently but slowly - doubling about every 18 months, reaching its current level of around $8k/mo. Over this time we redesigned the website, and found a company to create an explainer video for the service (both through 99Designs). We have not spent much on paid user acquisition, we experimented with it a bit a few years ago without positive results. I think the difficulty is that some user education is required for them...
