This is a really good point too, especially when considered the whole 99% rule or what not. Tech community sites like Hacker News, and web dev sites like Smashing Magazine or CSS Tricks or what not have a large audience of lurkers that keep up to date with everything mentioned there yet don't spend their time posting about it on social media. Hell, I'd say I'm in the same boat there too. Read a lot of these kinds of sites and blog articles, but generally don't talk about 'em online much.

Of course that's not to say being in it for the paycheck is necessarily a bad thing. Not everyone needs to be 'passionate' about their job to do well in it, and if say, my doctor or surgeon is good at what they do, I don't really care if they spend all their free time talking medical issues on social media or posting on Hospital News or what not.