Shoot any target in the same place over anmd over and it will wear out. I haven't shot for groups in years since the targets have multiple dots shoot to the different dots front back and sides and the target life will be much longer. Blocks are good but if you want one that will last longer get a Rinehart target. They are a bit more difficult to remove the arrow from but they last and hold up. he Rinehart 18-1 even comes with a warranty of sorts, if you shoot it out to where the fletching is in to the target on all 18 faces in a year time they will replace it with a new one. Archery shops have tried and few of those targets have been replaced. A release agent of oil or soap will make arrow removal from one much easier.
I just bought the 18-1 target last week. Haven't gotten to shoot it yet, but the reviews were overwhelmingly good, and I got tired of always settling for sub par products and bought what seems to be the best target on the market.