... when they are created.
Social networks are inherently evil, that's their business model: manipulate users into addiction and serve ads.
How do non-evil social networks look like? They're forums, plain old forums.
But you don't become an ultra trillionaire with PhpBB.
Nowadays they are an evil manipulation mess, but I don't think it is an inherit property of social networks.
Phase 2: profit (through using and abusing their users).
Both steps are written in stone in their business plan on day 1, you just don't know it.
As a user you were still in phase 1.
Similar story with image hosting websites. First they don't have ads and load fast and don't really have image restrictions. Then they start adding restrictions and ads.
Before this, we had centuries of businesses who were sustainable by just charging a fair premium on the goods they sold to their customers, and both sides were happy enough with the transaction to continue.
You'll never get enough traction to break through to the mainstream, unless something radical changes.
What's evil about Mastodon, Matrix, Pleroma, diaspora, etc?
I don't know anyone using any of those networks.
Nothing wrong with showing me, and clearly denoting, a tweet that I might like in between other tweets I browse.
Don't understand this black and white thinking.
Whether or not they show topic data for a particular tweet, they generally have it. I only use the chronological timeline, and I cleared out the interests list a year or two back, but they have built up a profile of hundreds of interests for me.
I suspect forcing the ranked timeline on people is all about a small portion of Twitter juicing their engagement metrics, with no grand cross-team strategy in play.
While it's important to know what tweets a user is interacting with, the personalization option can surface more things as "You might like", "You follow x, and he liked", "Interesting tweet on the topics you follow/might like" and so on. Whether or not you choose to interact with anyone or more of those is a signal, and helps with advertising (if advertising is a question of "What tweet/content you are likely to interact with?"). Other than brands, most twitter influencers, or would-be influencers end up spending money on twitter ads to gain followers.
With a reverse chronological timeline, it's hard to surface those tweets from outside the network without a jarring experience. They also realize the power of defaults and hence they decided to take away the default option.