I haven't used any "paid for" shampoo in over a month, and I've barely made a dent...and they're good shampoos!
I us Pamper's samples of wipes, I use tide Pods for laundry...I brush my teeth with free toothpaste...I've gotten free dental floss...
I don't order things I know I'll definitely never use, but I've already used plenty of the stuff I've gotten.