I started working fulltime as a coder maybe 3 years ago. Before that I coded a lot on my free time, but since I started doing it fulltime at work, I did less on my spare time, and now it's basically no coding at all on my spare time.
I can understand that an employer wants someone who practices their work-related skills on their free time, but is it really that important?
If you want productive employees, isn't it even more important that they eat healthy, exercise and sleep well?
Just counting amount of hours/week spent on coding sounds like quantity over quality to me...