Yes, you can. As a non-registered user, you can read and connect with any Scard Profile you visit. The contact information in the profile is for visitors to connect with the profile owner, if there is no contact information you might need to use the Scard Private Message which you will need to be a registered user.
Once registered, you are able to communicate with them utilising the Scard Private Message, and you can also add one another to the Scard Friendlist, and more. We will need you to prove that your account is genuine, not fraudulent, you must verify it once it is registered. This provides unbeatable confidence for anybody you want to network with Scard.