Yep. There is always vig.
The action points merely means: Multiply the base bet ($110/100) by the number of points the game closes relative to the point spread.
Some software will limit the max risk/win to say 5 or 10 total points. The reason for this is simple. The book must withhold the funds from your account for the maximum lay (loss) amount. If the number of action points were unlimited, you could lose the game by 50 points and owe the book a lot more money than they are going to trust you to pay. Since they are limiting your loss, they must also limit your win by the same amount of points. Unless you have unlimited credit, this is the only responsible accounting method.