I've been writing fiction for pleasure for years, and recently started a concerted push to finish something and present it to the world. I've had to step back and recognize that my notions about publishing were outdated - even 2 years ago, things were different.
My current approach is, as a previous poster noted, that I'm writing for the privilege of getting to share my thoughts with the world.
I've also seen the virtual tip jar work in specific situations, and right now I'm most interested in pursuing a model where 1) I do the marketing, making the book available digitally for free, or as a print on demand for cost, and 2) including in the book a note to the effect of "if you're enjoying this, please visit $WEBSITE and throw something in the tip jar."
Is it naive? I don't know. But it seems like trusting in readers' good natures is where I land when I pivot 180 degrees from the DRM and sue mentality.