If from another page it will show the post id here to determine the optional redirect back after activation

param used in social sharing and potentially from emails to see where user comes from

param used in social shariIf from a social share/share and win/upviral link . Can use this on the list of new users to show/hide a group image to indicate if the user had actually been referred or was a 'new' user.

Where Available

If user clicks from the merchants page it will include param/ep token to fill this field. This could then maybe give the user the option to sign up as a user as well as a merchant. This can also create a DRIP feed to add the merchant tag to the user