Pseudonymous -
On Goldstein, the way I see his early work as I do is because I read something about the history of the US record industry.

Unusually for you, I find this post somewhat confused. You talk about the early ethnically specialised and 'Race' records as though he was part of this. The real boom era of these labels OKeh, Victor, Brunswick etc. was roughly the decade from 1923, For the first time the urban Black communites of large American cities had some disposable income and the various immigrant groups - Polish, Jewish, Irish, Italian etc. were establishing themselves. These companies nearly all wanted their culture represented on 78s and these smallish independent labels provided it. And thank goodness that they did! If I look at my record collection, I find very many blues, early jazz, Old Time, Irish, Klezmer and other genres compilations from that era. Many were just single run pressings but others by the likes of Louis Armstrong and Johnny Dodds remained in the various catalogues for years. They nearly collapsed in the long depression of the 1930s.
By the time that Goldstein became involved as record producer in the 1950s, the record industry was a totally different place dominated by the big corporations like RCA each with their own stable of top selling stars. To become involved in recording minority folk music and blues became almost a political statement in itself. The two of his productions that have been mentioned recently in this thread were unlikely to make a pile of money for anybody.