Twitter’s Spaces product was not necessarily built to host events with hundreds of thousands of listeners. Most other Spaces have — at most — several hundred listeners at a time. Spaces was described as a “prototype” and “janky” tool by a former Twitter employee familiar with its development.
“Spaces was largely a prototype, not a finished product,” the former employee told CNN. “It’s a beta test that never ended.”
https://www.cnn.com/2023/05/24/tech/twitter-desantis-meltdown/index.html