We do releases fairly frequently with bug fixes for all of our products. What is meant by hot-fixes is custom builds of a specific version of a product w/ a bug fix.

For Xamarin Studio (the product I work on), I often provide bug reporters with the latest internal build with my patch for their bug no matter what subscription they have (at least for the bigger issues). It's not quite the same thing, but I suspect that'd be good enough for most people until the next official point-release.