That and GP are both plain untrue. The system literally hides useful and/or organic contents. There's also no signs of ads doing better than before.

The current Twitter algorithm funnel users into divided bubbles of couple hundreds users each, and cap numbers and quality metrics of contents that are allowed to be accessed beyond the bubbles, except for spams, which are artificially kept in the global context. Or something like that. To maintain the facade of a unified timeline, the system picks contents that would have been plausibly popular in the absence of it and push it into global contexts, but those are so out of contexts and out of regular system behaviors that it only brews hostility among the users against the system.