The purebred EBT fancy, generally speaking, has been fairly snobby and elitist in nature for a long time. The "pure" thing is like the biggest deal to them. Their pricing keeps the "workers" away and that's why the pit is the go-to... Could be, but it could also come from pits being much much cheaper anyway. Hand in hand like that these matters go, Yoda. Pits are everywhere, cost little and are replaceable, whereas the EBT isn't as omnipresent and it costs a bit on top.
P.S. The general public was successfully convinced that the EBT is a waste of time. By the EBT fancy. Score.
P.P.S. Eastern Europe, S.Africa and Australia excluded, obviously. (a)