Utilize the input text as a context reference, choose the right relationship between versus and music streaming from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

This sequential decrease was primarily due to, number one, greater revenue mix of lower-margin digital content services, including the live broadcast of HUYA and music streaming services; two, higher mix of lower-margins platform games versus PC games.

Answer: distribution_format