> Smells like proper job to me!

In proper jobs you get paid, and there is someone telling you what to do. Neither of those things apply to Wikipedia.

There is no NDA. The only exception is if you volunteer to join the group that deals with private data (this is not the same as being an Admin, its the step above. Its a very small group)

Comittees exist but are largely optional. If you want to change things at a meta level or do wide coordination, there is no getting around that. But such stuff is optional. You don't need to join any comittees if you just want to write articles.

Now, if you want to say its exploitative (editors put in the labour and get almost none of the created value), then fair point. I would say its no more or less exploitative than your average open source project.