What do you do when an Investor signs up on your launch page?

We have over 50 angel investors that have signed up on our launch page. Does that mean that they are really interested in the company? Is this something angel investors do on a regular basis or are the investors seriously interested in the company? Should I contact each investor asking for a meeting or simply treat them like users? We are not necessarily ready to fundraise yet as we want to wait until we build some tangible traction first.- But if we get a good offer for our seed round, we will take it.