I'm not entirely sure that I care if you register. It might be beneficial, but I'm more concerned about you finding it useful and using it / sharing it with other people. If a lot of people use it anonymously I think it would be fine, although maybe that's naive...

The second line is meant to explain that after one month you can pay $0.99 and download all the full-size photos (before one month you can do that for free). Is that how you understood it?