Does it automatically convert all money received into Bitcoin?

Yeah... Resurrected as monero.

But, doesn't this just mean you're giving yourself money? Since you're upvoting your own post, you're not gaining any extra cash for it.

You could do it to gain more visibility though, but I think that's a problem that even sites without sats as upvotes also face.

Ultimately, if your post isn't good enough, you're not getting extra sats.