I think it would be difficult to make that work, because Wikipedia has a direct way of converting users into contributors: you see something wrong, you edit the article, it's not wrong anymore.
Whereas if you do the same with machine learning training data, the influence is much more indirect and you may have to add a lot of data to fix one particular case, which is not very motivating.
Comments
This could work with a Wikipedia-like model. It's very difficult to pull off, but a next-generation Wikipedia would look like this.
I think it would be difficult to make that work, because Wikipedia has a direct way of converting users into contributors: you see something wrong, you edit the article, it's not wrong anymore.
Whereas if you do the same with machine learning training data, the influence is much more indirect and you may have to add a lot of data to fix one particular case, which is not very motivating.