Why is it written like this? A minus number shows you how much money you have to bet to win $100. With the Packers at -205 you would have to bet $205 to win $100 on top of the original money you put down.
A plus number shows you how much you will win on top of what you first bet. So if you bet $100 on the Eagles to win at odds of +168 you would win $68.
Let's say you have two teams in a game like the Packers and the Eagles. The favorites will most likely be written with a minus and the underdogs with a plus.
In this case the Packers are the favorites at money line odds of -205 with PointsBet. Let's say you bet $100 on Packers. that would mean you would win $48.78. A bet of $100 on the Eagles who are the underdogs would win $68.