@smooth already answered most of your questions, but allow me to add a few more insights

The @sbdpotato isn't looking for profit, because it doesn't care about the conversion price. Sometimes it will make profits others it will have losses.

The whole point is to reduce sbd supply and theoretically increase it's price (Wich I don't think it works)

But it's kind of hard to measure it effectiveness, because a lot of other factors are pressuring the sbd price in one direction or another.

For example, the price increase we are seeing now have more to do with BTC price going up (since it pulls all alt coins prices with it) than with actual effect of SBD supply being reduced.