Graphic designers, how are you making your beer money?

I'll start. I have been uploading designs to print-on-demand platforms like Redbubble and Zazzle. It's not much, but without doing any marketing I have been making around $30 a month.

Since last month I have also started selling my work on stock websites such as VectorStock and Adobe Stock. Got a few downloads so far, netting me a total of $5.

Curious and happy to hear what other graphic designers have been using to make their beer money.