In my not so humble opinion, modding in general is a pretty sweet thing. Modding Half-life (or Half-life 2) for example has brought tons of awesome stuff in the market. I’m sure there’s tons of indie games (freeware, shareware, and otherware) that provide modding support, and it makes things fun for some players.
Finnish game Notrium is very moddable and has a community that has created numerous little mods for the game. Cliff Harris from Positech makes games that are moddable to some extent.
I don’t have numbers (and haven’t really checked anywhere), but my gut feeling says to me that modding can be a good thing (but you can leave without it too). It can provide tools for creativity. If you think of Little Big Planet – that’s one type of “moddable” game where you can build all kind of stuff. Even Civilization III (the best turn-based game ever in the history of Planet Earth) could be “modded” (I remember going through the English language file and translating everything into Finnish). It’s fun for creative players (and everybody is somewhat creative, right?)
I have a clear opinion for my own game: it’s planned to be moddable from start (since I needed a quick way to adjust weapon values, change zombie hitpoints and create levels) – there’s some scripting possibility – but I’m not releasing the thing public in the beginning (since it’s adds bit more work, so I’ll simply “do it later” if at all).
What’s your take on this? Is your game moddable? Any plans to make your game moddable?
And the last question is: is it worth it?