Social media has been in rapid decay mode since it first launched. You are a long way behind the times
That's true, but since the rate of decay is much slower than the exponential rate of user acquisition, say, from a decade ago, it takes much longer to notice that there are fewer and fewer people online.
A careful analysis might lead to the conclusion that most
human users, on average, will never notice a difference between humans and a GPT-based AI...
As such, driving engagement up with 'bots talking to each other — giving the impression that there is a lot of activity going on! — is not necessarily a terrible idea. It's just the equivalent of 'buying likes' on Facebook, to give an example. In the long run, it might become even cheaper than to acquire a 'package of likes' (either directly from Meta's sales department or from third-parties).
In the long run, however, it begs the question of what the point will be of being inside one's own private echo chamber with an audience consisting entirely of bots. Talk about digital solipsism!
And, also, under such circumstances, why should you be on Facebook consuming ads? You can just shortcut the middleman (Facebook in this case) and run your own echo chamber locally, free from scrapping algorithms and the like...