John Ries -- Institute for Historical Review

... The picture of the relationship between German big business and the Nazi party which Turner provides us is one that reveals how little big business had to do with the party's success ... Most of the NSDAP funds were derived from membership dues, interest-free loans, and the gate receipts from the many mass rallies the party held ... In sum, the NSDAP was a prototypical "grass-roots" political organization able to expand and prosper during a period when most of the bourgeois parties suffered a serious loss of support.
http://www.ihr.org/jhr/v08/v08p369_Ries.html