Although I don't drive in MOE I do have an opinion
If you compare this digital endurance race to a real life endurance race there is a big differance. In reallife it is a battle to test if it can hold up, the car that is... If you roll it, crash it, park it in the gravel or get some technical failure it is over, done, no more for you... and they practise for a year for such an event, develop the car for lots of $$ etc. etc.
In my eye's the best and simplest solution to your problem would be... drum roll please. OUT is OUT... crash it, roll it, park it in the gravel or get a "technical" failure.. it's bye bye, pack in the spare tires and go home... Ofcourse this (negative word here) if your isp decides to unplug you for a second, but it also (an other negative word here) when your engine blow or your tranny breaks..
I think it would make a lot more "endurance" and adds the part where it's not the fastest guys that make it but the guys that hold everything together..
Just my 2 cents, I guess none of you are willing to go down this road, but in my eyes it's what makes endurance endurance. Imagne Le Mans.. "Well Bentley is down to their 5th car now, 2 took fire, one parked in the gravel and 2 blown engines. Lucky for them they took along 10 cars this weekend."