I agree the life sometimes seems a bit short given the price but if you're getting 8 or 10 games of stroke play out of a ball you're doing pretty well. I assume you're playing more CTTH than stroke play?
I don't think I've ever played a ball more than a couple of rounds in real life before it gets cut up a bit and has to be replaced, especially something soft like a Pro V1.
You're obviously very kind to your balls!
Whoa! Just checked your profile. Seriously, don't bother with Nike balls for blitz games. There are plenty of cheaper balls that will do the job. If you're OK with a full speed meter the Tour SD are great value and work damn well.