Some of these cases might just be them trying to save their nonexistent reputation ^{[I prefer not to trust if I can't confirm every single detail]}, but don't lose hope ^{[I hope you regain access to your account soon]}... If you know someone with a huge following, that might also work since they restored Elon's account within minutes/hours of him tweeting about it ^[source].

There's clearly a pattern: As soon as a significant amount is detected, their automated system flags it... Then they drag these cases for a long time until users give up recovering them ^{[previously mentioned by @ScamViruS]}.