Comment by stevekemp

I posted a simple Dynamic DNS service, http://dhcp.io, based upon Amazon Route53. I received about 5,000 users in the first month, most of whom were using their dynamic hostnames in SPAM mail.

I gradually started killing more and more accounts. The admin overhead was a pain, so I polled a few users and said "Hey this is crippling, would you pay?" Many said yes. I knocked up stripe integration and received zero paying clients.

Closed registrations to new users, and setup a git-based DNS host instead, https://dns-api.com . Users pay for that from the first week, and it slowly ticks over. I've been using the service myself for all my new domain registrations and I'm constantly impressed at how smooth it is.