Simple, really: they earn the majority of that $1 for providing feedback :)
To build on that, for most of these blogs this is the first time they're earning any mentionable revenue from running their websites. Not only is it making their lives easier -- it's actually rewarding them for their passion yada yada.
To build on that, for most of these blogs this is the first time they're earning any mentionable revenue from running their websites. Not only is it making their lives easier -- it's actually rewarding them for their passion yada yada.