Partnerships with other companies

In China, many of the major social media companies do cross-partnerships with non-competitive companies to increase their customer base. It’s an online exchange that benefits both parties, and would be the equivalent of Twitter Blue offering its members a free Spotify membership as a perk.

The closest equivalents (in the Western world) are offline museum reciprocity programs, where membership in one museum grants you free access to a select list of other museums around the country.