I share your fears, but I do have some doubts about their metrics (see the link to a chart in another thread).
But maybe (just dumping some thoughts), after the scandals, DAU and MAU might not be anymore as relevant as in the past for Facebook's data collection if users, who are now (supposed to be) more aware of their data being shared and used actively for not only good stuff, just keep using it for only e.g. trivial posts (e.g. "I bought a bike today" instead of "I support/hate the president blahblah") or maybe make it more challenging for AI/aggregation using "irony" (algorithm would understand it as it's written, but the human interpretation would actually be the opposite), etc... . But maybe I'm just a desperate deluded optimist :)
But maybe (just dumping some thoughts), after the scandals, DAU and MAU might not be anymore as relevant as in the past for Facebook's data collection if users, who are now (supposed to be) more aware of their data being shared and used actively for not only good stuff, just keep using it for only e.g. trivial posts (e.g. "I bought a bike today" instead of "I support/hate the president blahblah") or maybe make it more challenging for AI/aggregation using "irony" (algorithm would understand it as it's written, but the human interpretation would actually be the opposite), etc... . But maybe I'm just a desperate deluded optimist :)