The term “advance fee” as used in this part is a fee claimed, demanded, charged, received, collected or contracted from a principal for a listing, advertisement or offer to sell or lease property, other than in a newspaper of general circulation, issued primarily for the purpose of promoting the sale or lease of business opportunities or real estate or for referral to real estate brokers or salesmen, or soliciting borrowers or lenders for, or to negotiate loans on, business opportunities or real estate. As used in this section, “advance fee” does not include “security” as that term is used in Section 1950.5 of the Civil Code, or a “screening fee” as that term is used in Section 1950.6 of the Civil Code. This section does not exempt from regulation the charging or collecting of a fee under Section 1950 1950.6 offees that are not subject to those sections.