The folks taking their accounts private aren't doing any sort of scientific test, and there are folks who try it who don't see engagement go up. Unless you're somehow doing statistically significant tests with large groups of users, the same content, at the same time, there are an immense number of confounding variables here.
To me it seems logical, if you find a certain type of error like that, you go searching elsewhere to see where previous coders made the same kind of mistake. (Even when previous coder = myself)
https://twitter.com/elonmusk/status/1624660886572126209?s=46...
It's deeply sad and funny that he's gutted Twitter so badly that, instead of having a team that could investigate these user complaints and determine whether they have merit and what the cause is, the CEO of a major tech platform resorted to "Huh, weird, let me try. LOL that's crazy."
Looks to me like the ability to investigate and respond to problems has improved if you ask me.
Brings into question what the CEOs of Tesla and SpaceX are doing with their time. Also investigating bugs at Twitter, you say? Amazing that the CEOs of three companies are all working to solve Twitter’s problems. Must be the off season in space.
A fitting punishment.