Because platforms intentionally go away from their open beginnings once they gain traction and moat. Facebook's removal of xmpp was the first, then Twitter came along with restricting features to only the official client (polls and medis in DMs) years ago, and now it's cat and mouse, with Twitter kicking off apps with zero notice.

Even Reddit, which has historically been extremely open towards third party apps, now gates features - RIF for example can't integrate with rewards, which is IMO pretty moronic as it could be a pretty good revenue stream for Reddit.

Capitalism has failed, and it's high time governments step in to break open the walls of the gardens.