Actual number of Gnostics in 2nd century?
I have often read Contra Celsus and I think it is interesting the degree of confusion Celsus appears to get into establishing what Christians believe in what position, sometimes stating something we think is orthodox and sometimes assuming gnostic concepts apply to all Christians. It seems like in Alexandria during his lifetime, if he asked some Christian their opinions, he was getting gnostics answering him just as often as proto-orthodox Christians. Origen finds it strange how frequently he quotes Ophites and assumes their opinions apply to all Christians, saying that in his own time he had looked around for Ophites who could explain their diagram but never found any, guessing they may be entirely extinct. They somehow both came across the same mystery diagram, indicating it must have been making the rounds quite a bit.
This all seems to indicate that in Alexandria the number of people in different gnostic sects was huge and that adding them all together were similar in number to the orthodox Christians, or perhaps even more numerous. Has any scholar tried to make demographic estimates of the sects in the 2nd century?