There is a checkbox that says "Use custom URL" - it's even in your screenshot. It is obviously designed to insert something else - a 1x1 pixel for example. That

There is a checkbox that says "Use custom URL" - it's even in your screenshot. It is obviously designed to insert something else - a 1x1 pixel for example. That is not a "hack" and as it is there for everyone, it clearly IS the way Google designed it to function.