Or the simpler explanation is that the chronological timeline isn't actually the preferred setting, outside of a small but vocal minority.
If the chronological timeline is somehow hurting their profitability, why would they offer it at all? I think the more obvious explanation is that very few people were actually using it according to their analytics, so the switch no longer occupies prime UI/UX real estate. If it was some sort of conspiracy, they would have just killed the feature.
> As the common belief goes, the "algorithmic" one is more profitable. I buy this, intuitively, because it seems natural that it'd be harder to sneak in something jarring if you were viewing a more traditional timeline.
I don't follow this logic. There's nothing stopping Twitter from inserting the same ads at the same frequency just because the Tweets are ordered differently.