In the early decades CE literally hundreds of cults arose. In part this was due to the exposure to farflung cultures and cults that were arriving in Palestine the last few centuries BC and CE. Add to that the fact that most all comon folks were illiterate and easy prey to new and novel promises of salvation or deliverence from oppression. I pulled this from an email I received.
Keith Hopkins' ' A World Full Of Gods -
Pagans, Jews and Christians in the Roman Empire'.
In the chapter on 'The Christian Revolution', Hopkins summarises
contemporary scholarship on Christian numbers in the early centuries.
Hopkins notes that 'early Christianity was tiny and scattered.' The best
estimates are for considerably fewer than 10,000 Christians world-wide in
100 CE, and only about 200,000 in 200 CE, scattered throughout several
hundred towns (p. 85) . (He cites his own 'Early Christian Number and its
Implications, Journal of Early Christian Studies, 6 (1998), and sociologist
Rodney Starks' The Rise of Early Christianity, (Princeton 1996) among others.
What I found of particular interest, and worth sharing, was
Hopkins overlaying of these figures with existence of 'educated but
varied and thin sub-elites (merchants, middle land-owners, teachers, clerks
etc. altogether amounting to less than 2 per cent of adult males in the
Roman world) who could write and read fluently.'
Hopkins calculates that in the early decade of the sect, only a few dozen
Christians could read or write fluently. Allowing even for relatively high
rates of literacy, "by the end of the first century, all Christianity is
likely to have included at any one time, less that fifty adult men who
could write or read biblical texts fluently. And even by the end of the
second century, although there may have been (by the same reckoning) over a
thousand fluently literate Christians, that still works out, on average, as
only about two literates per community.... Written Christianity was
initially constructed by a tiny group of socially marginal men.'
A telling insight.