1) Its usable forever, its checked by cookies but you could just return to that URL and continue using it. However its possible that another user could add remove things, which is why the password protection exists.

2) That was important to us, glad it came across that way.

3) Thanks, looking into it.

4) We have a number of affiliates including Amazon, hopefully with more traffic we can expand. We are also looking into recommendations and price matching directly related to affiliates.