If a site has a black box algorithm that uses unlawful criteria (race) to limit the scope of searches, the site will not be immune under Section 230c and are liable if and only if they require the users to provide the information (race) as a condition of accessing its service in which case they act as “information content provider”
You need to remember only your Gmail password. The rest--
I simply maintain a single Google spreadsheet(well ordered) to
store every password for services like Facebook, Twitter, Github, etc.