Google has deals with websites that make login easier: you can log in to almost everything with a gmail account. But gmail and Google assets in general, however, are not secure or private. People are starting to ‘de-Google’ as an attempt for more internet privacy. It would be a great favour and very popular for your revenue as well if you could make deals with websites that require logging in. I, hypocritically and with guilt, had to use gmail to log into change.org here