There's no source, but it stands to reason: Facebook has something like 2 billion daily active users and it its roots are in nonpolitical social networking (meaning baby pictures, etc.). Parler had something like 2-3 million daily active users at its peak [1], and most of them joined after the Twitter started putting warning labels on false claims of election fraud. Parler also billed itself as a "free speech" social network, which in practice means allowing things other social networks prohibit, which means its mainly gets users who want to post and read such stuff [2].
There's no source, but it stands to reason: Facebook has something like 2 billion daily active users and it its roots are in nonpolitical social networking (meaning baby pictures, etc.). Parler had something like 2-3 million daily active users at its peak [1], and most of them joined after the Twitter started putting warning labels on false claims of election fraud. Parler also billed itself as a "free speech" social network, which in practice means allowing things other social networks prohibit, which means its mainly gets users who want to post and read such stuff [2].
[1] https://www.cnn.com/2020/12/10/tech/parler-downloads/index.h...
[2] https://www.pbs.org/newshour/nation/right-wing-users-flock-t...