An interesting question but I caution you not to follow blindly in the path of what has worked for other products. The conversion rate of social logins with _y

An interesting question but I caution you not to follow blindly in the path of what has worked for other products. The conversion rate of social logins with _your customers_ is the ultimate metric to look at. They are trivial to implement, do some A/B testing with your product and follow the metrics. A CRM product, for example, might see almost zero social signups compared to email. But an app for photo editing might see 90%. Know and serve your own customers before following others' metrics. And good luck :)