I don't know. All of those sites seem to be small, personal passion projects. I'm sure that more than a few people with personal blogs submit to all of them
No. For me, work pays my bills and funds my (modest) lifestyle. With $10 million in the bank (or invested wisely), I won't need to work. I could continue to live my life the way I do and not have to worry about the ridiculousness of the corporate world.