For the same reason poeple are buying 5 pin sights but swear up and down on here there is now way they would ever shoot over 40 yds. Why have 5 pins! A pendulum sight is no different than a single pin sight for shooting on level ground. I would be willing to bet most poeple that bust on them have never had one on their bow either.
ORIGINAL: Red Lion
I posted a recent thread inquiring about pendulums and got mixed feedback with most not being great. Positive was that it compensated well from an elevated stand. Negative was that it did not do well compensating from a stand if you hunted from varying heights or what you were shooting at on the group was not on flat land. Another point I was given, was if they are so good, why are there only a few makers, types and few use them?