...approximately October 5th 1995. spy.net was requested before it was announced that they were charging, but they grandfathered us in anyway. :)
Of course, like an old fogey, I'll state that it was all downhill from there. The ``one organization, one domain'' rules, etc... all died when people realized they could make more money by making it chaos.
Some good probably came out of that, though I'd say domain squatters did enough harm to make that severely unbalanced.