[James Blint]

Then it just makes it confusing as you have to pit way before the 50min mark anyway in these races with double fuel rate, so it doesn't change anything to have them on. Most people still try to go to the pit before the last ten minutes, for their second or even third pit stop. Usually the purpose of having windows closing like this is also having comprehensive race positions at some point, like say the one leading in the last 15 min isn't in fact Bob who hasn't pitted yet and will finish P8 in the end.