Hi Hacker News! OP here. We recently launched our new Customer Success Management application. It's been a really long road but we are starting to see a bit of traction and some happy customers. Happy to answer any questions or give you a demo!
At this point we are targeting other SaaS businesses who already know what Customer Success is, why it's important and what their goals are. They are definitely the "low-hanging fruit".
We don't really have the resources to go after/educate other businesses about the benefits (but there are many). In time we'll broaden our marketing a bit and try and bring Customer Success to the masses.