tl;dr: Nebula, the creator-owned streaming service, released Nebula Sans, a custom humanist sans-serif typeface built on Adobe's Source Sans as a drop-in replacement for their previous brand font, Whitney SSm. The font offers six weights with italics, includes stylistic alternates and tabular figures, and is free under the SIL Open Font License. Nebula built it to gain customization control, add features like tabular numerals for video timestamps, and avoid escalating commercial licensing costs.