295 lists means 295 people. As far as I know Altars basically are taken in pair, so 43 times means like it was taken by 22 people. +-. So 22 out of 295, it is less then 10%. Or maybe I'm wrong and they were taken always by one in each list? Maybe this should be also considered, not only total amount?For example I believe from a quick look:
Altar of Undeath (claimed as useless / never used etc) was used 43 times in 295 tournament lists collected.
Units used that much didn't tend to get price drops in even lower tier armies, AFAIK.