Off hours study is the standard for me. Its a bonus if you like the topic.
Discussion
You're studying things for an employer outside of work and not being paid for it?
Patially true. My work is my hobby as well. And must say that it was first a hobby and later my income source.
This is hard to apply outside of IT.
Mostly learning things to keep up with the others who are way more experienced. This means it will not be like this forever. New tech education is done in the working hours.