Even a "pure entertainment" product that doesn't need to do any particular ideological heavy lifting has a hard time. If you're taping an episode of a sitcom today, the language you use might have passed to "cringy" by the time it airs, and the trend you used as a plot device might have fizzled.

Social media's ability to stay relevant is managed by constantly eating its own-- people fall in and out of trend. That makes it harder to use as a means to inject a specific message; you'd need to be constantly generating new users and getting them into closed circle communities as the old ones wear out their usefulness. Note I don't say impossible, but it's an interesting set of challenges and probably pretty different from the ones the guys running Radio Havana face.