Unlike many other HN users in this thread, I've never directly benefited from my blog. But I have used my blog to help other people (many of them furries) get into the tech industry. So I'd argue that counts for something.
(I wrote a series called Furward Momentum if you're curious how.)
The main reason why I don't benefit from my blog is because I don't want to. I write for my own amusement, because I enjoy writing.
I occasionally have to turn down the bold recruiter, and frequently get harassed by people looking to pay for a product endorsement or "guest post". (I've asked them for writing samples "in my style" and rejected them for not putting enough furries in it, but that joke loses novelty fast.)