"members of the public"
includes—
a)members of any section of the public, whether selected as clients, members, shareholders, employees or ex-employees of the person issuing an invitation to acquire a participatory interest in a portfolio; and
b)a financial institution regulated by any law,

but excludes persons confined to a restricted circle of individuals with a common interest who receive the invitation in circumstances which can properly be regarded as a domestic or private business venture between those persons and the person issuing the invitation;