If it was all about the money, I should be spending my time managing my assets, not writing. At least my hourly rate would go up astronomically. But, I do like the writing and I do like the earning rewards on the writing. don't worry, it isn't dirty to say that you like earning on the work you put in.
I think that is called hobbies where earning does not really matters directly but through reward .A hobbyist always focused on something which make them feel proud, little fame and reward.
For instance: Burger without bun does not taste and feel like eating burger , Splinterland playing without interest is boring, Same goes to hobby where your interest to drive the task matters and rewards glorify you.
I am definitely a hobbyist -but I might be a professional hobbyist, as I feel like all of my work is a hobby :)