With the debut of "House of the Dragon" just weeks away, Duolingo wants "Game of Thrones" fans to brush up on their dragon-lord lingo.

Moore, an early investor in the brand, starred in ads for the D2C company.

While there's no shortage of D2C period products, Viv is a start-up that stands out through activism.

Stix, Prjkt Ruby and Favor are among companies going on offense with efforts mostly aimed at boosting the sale of emergency contraception.