The real question is - why maintain an "good" credit record/score that does nothing for you, when you can put it to work, improve it, and earn a few hundred thousand miles that (even after devaluations) can save you a boatload of money on travel?

2013 totals for Misses and me combined:

1K miles from paid flights
1.6 million miles and points from CC signups
300K miles and points from spending and promos

760K miles and points burned