Some are arguing that the algorithm is so simple that there is nothing to disclose. That means that spamming has reached a plateau and can't get anyworse.

Also, Twitter's spam control has been objectively bad.

https://twitter.com/paulg/status/1487022342630957062?lang=en

People think that the entire platform has been hijacked by left-wing / progressives and the reason for lack of transparency is more insiduos than "spam". For example, being liable for what they told Congress.