With the fragmented nature of current internet, that is our big problem - we do not have visibility into our own data.
Sometimes, we do not care - probably because we do not deal with a site more than once, or it is OK even if they have wrong data.
But we do care when WE want to know - what email did I use to register with Sears.com again? What phone number did I give them? Can I push a new email or phone number to them?
Seqrly is not there yet, but it CAN give you visibility into what you have currently shared with other web sites. So, while we cannot push new values to web sites, we CAN tell you which email and phone number you have shared with a particular web site.