P.S., A reader wants to know if I have other sources of income than my writing.
Well, I have a very hardworking wife.
But, other than that, no.
I have been a full time professional writer throughout this century. Virtually everything I write is published under my own name and is linked to from my websites or otherwise easily accessible on the web (e.g., I comment on other websites under my own name). I don't do corporate writing -- not that I have anything against it, just that it would take a lot of time to do it well and would thus distract from my writing under my own name.
I've seen the suggestion that I probably also write under a pseudonym. If only there were 29 hours in a day. I would presume that at least the quantity (and, hopefully, quality) of my output would suggest I'm not just doing this in my spare time. I probably put in somewhere around 65 hours per week of work related to what you read. I can't imagine a more pleasant way to work 65 hours per week, but it doesn't leave much time for anything else. Hence, I'm highly dependent upon my readers.