The way I see it there has been 10 pushes with the select teams. If one played the line all losses. I don't have in which set they would have been but you would have had to make up those losses in set 2 or 3. To me way too much risk to only play the spread.
It seems more risky to play money lines, you are risking much less with spread, especially after a loss. The spread would be more profitable even if you lost more