Question re HEM statistic

Why isn't the "Call Open" stat used more when we give players' stats? It seems fairly important...no?

People should post relevant reads/stats whenever they post a hand. "Call Open" is one of those stats that ties in closely with VPIP though.

I have limp then fold to raise stat, but I rarely use it. If someone is opening limping a lot, they are passive, so I can isolate with kxs+ Axs+ jt+, if I know that he fold after limping a lot I might add J7 type hands, but overall I do not think it makes a big difference.

{Moved from BC}

Does call open refer to when a player calls an open raise? Or is it another term for open limp?