I believe it’s because a lot of people (or, enough people that it’s a thing) will subscribe to a channel for a specific sort of content, not a personality. If the channel starts to do things that aren’t that content, then people will unsubscribe so as to avoid seeing random things they don’t want to have cluttering up their subscription feed.
Not OP as well, but as someone who relies on chronological and abhors recommended/algorithm feeds: I don’t doubt that it’s because if a site has a chronological feed then you as an artist or content creator know that when you post something (say, 5 o’clock), it will show up on everyone’s subscription/follow feed when they scroll past 5 o’clock on their feed, it 100% appears to them during their scroll. It will always be there, in that spot.
With algorithm feeds, it’s literally anyone’s guess as to when or if your post will show up in their feeds, since it randomly populates what they see with content from any random time period. And good luck trying to find a post you came across the other day, or in an earlier session on the website.
To say nothing of how a user’s / business’s page can appear if it’s not displayed chronologically. Same issue there, only worse since you’d ideally want to be showing the most recent things you’ve been displaying or posting as it’s most relevant to what you do.
It’s just 100k people paying 10 bucks each. It sounds like a lot of money but when you think about the numbers involved it gets really quite reasonable for someone in her position to do