The holiday season can be tight for many reasons. Unexpected expenses pop up, you always seem to spend more than you mean to, and something in the house always seems to sputter out. The spirit of generosity is a beautiful thing, but generosity does not have to mean money. Being generous with your time, your words, your passion, there is no monetary value on that.
For authors who make their livelihood off their writing, support like this is pure gold, especially during the holiday season. In an ideal deal world, I would buy twenty copies of all my favorite books and just give them out as presents but Adulting. There are many methods, as this above post highlights, beyond monetary, that can help support your favorite writers, popular and indie alike.