Alot of people offer to be devs and help out but its not so simple tbh. You can't just "become" a dev. Example, thallen the known hacker has offered to help out with coding the NGS. Unfortunately however, his reputation as a GST hacker precedes him and he's considered "At high risk" to mess around with graals base scripts if given developer powers.
If Thallen (Played graal since 1950) isn't trusted to become a developer, it's safe to assume that a lot of other people also won't be accepted. Someone with dev powers could do a lot of harm to the game, so they have to be really careful with who they put in. That's probably why there's rarely, if ever any new devs we hear about.