I would not be happy to have someone translating my posts without asking me the authorization to do so, in particular if they are aiming to earn money on them. And note that you have not put the direct link to the original post, which is the other thing I am feeling uncomfortable with.

To me, this kind of post is just a form of plagiarism. You are using the work of others.

However, as you said, if people like automated translation, they can vote for them. But on the other hand, if other people (like me) are not fans of this, they can say it (and you can just ignore my comment if you don't like it).