Thanks @Smallest_Skil for your suggestion about Gab :) I added it to the list.  Gab is now both open source & federated. This means it has stronger privacy and stronger security. Back in 2017-2018 when I reviewed Gab those were not fully available. My Gab profile at https://gab.com/Francewhoa Source about Gab open source & federated   https://gab.com/about   https://code.gab.com/gab/social/gab-social