Given the increased relevance of social networking sites (SNSs) for consumers around the globe, companies face the challenge of understanding motivations underlying consumers’ interactions with online brand-related content. Cross-cultural research on consumer motivations for online brand-related activities on SNSs, however, is limited. The present study explored, via in-depth interviews, reasons why Facebook users from individualistic (the Netherlands, the United States) and collectivistic (South Korea, Thailand) cultures engage with brand-related content. The findings provide in-depth insights, in particular, with regards to collectivistic consumers, to the varied interpretations of the motivations for COBRAs identified in previous literature. We also identified a new motivation specifically for collectivistic cultures: the desire to share an intention to purchase or try a product. Moreover, while collectivistic motivations were driven by the wish to express a sense of belonging to the social group, individualistic cultures appear to engage with brands mainly for obtaining advantages for themselves.