We have the same problem with our sass product: the product is "complete" in our minds, we don't want to add more features, make it more complicated, ... we perform minor updates of third-party components, some minor fixes, ... This means we don't maintain a blog with very recent posts, or a very active twitter. We have a daily usage counter on the homepage though, which shows that thousands of users use it these days. But from time to time someone still asks if the product is alive... We haven't found a solution to this yet: it's as if we are expected have a blog post every few days or weeks, create new stuff all the time, ...