Nice explanation Cassiel
Well, "TOSEC Member" status is nothing special or awesome to have. It just represents the group of members that are interested in the project and contribute (or tend to) regularly. That said, you can also become a member if you want to, it's not mandatory to be a renamer, I'm not one for example.
If you stick around and are interesting in helping us out by contributing with your dumps, creating some useful guides (like how to correctly dump DOS games, based on your and vicvan research), renaming, helping in many ways in any work that is needed then you became a member, even if you don't have the tag yet
As Cassiel said, (in a funny way), there is not a list of requisites you have to do or achieve, is simply based on your interest and time. If you want to help and be part of the team, there is always room for motivated and valuable people.