Whether you want to support Josh Marshall's growing professional empire or provide beer/rent money to your favorite "amateur" blogger it really is a good idea to throw a little support behind your favorite bloggers now and then. While it's easy and fun to set up a blog and post about things now and then, it's much harder to stay in the game consistently longer term, and that's something which really is necessary to build up the audience/credibility which allows someone to have a larger impact. Inevitably that pulls people somewhat away from family/career/etc.
I personally probably won't be making any fundraising pitches unless either my financial situation changes or I have a grand idea for empire expansion, though I of course always appreciate the tips, but please consider donating a bit now and again to your favorite bloggers.