We saw slight drop in fake email (disposable, temporary email addresses) signups but it became clear many login-with-google also use their secondary or spam ali

We saw slight drop in fake email (disposable, temporary email addresses) signups but it became clear many login-with-google also use their secondary or spam aliases. In B2B the big customers, those actually paying, rarely use social logins. Issues: Users don't remember which login method they used so next time they might try to create an account with email&password. login-with-google actually is the same as register-with-google, it doesn't tell you ahead if the user already has an account with your website. Some users expect to convert their login method to email&password. The flows for password change or forgot password are different. That said you can solve each as it happens, it doesn't matter with a small number of users. I'd still implement it later, it's likely not the reason why people bail during signup.