Totally disagree with your statement not to limit time not being worth it.
Not limiting time may increase EV, but it wont maximize dollar earned.
In the same way you limit your spread and play to maximize longevity and reduce EV as a consequence. Otherwise you would bet $5 until true count is +5 , then bet $1,000. This would maximize EV, but you would get kicked out quickly, and $ earned would be small.
If you limit the time you play you will maximize the $ you can earn, which is ultimately the goal.
You cannot spend EV, only $.