A pyramid scheme is a non-sustainable business model that involves promising participants payment, services or ideals, primarily for enrolling other people into the scheme or training them to take part, rather than supplying any real investment or sale of products or services to the public.
That does sound like BSI since they pay you in advance and never ask you to invest any of your own personal money. They represent some huge companies and sell those companies product so it seems pretty legit. I think people get frustrated looking for jobs and get upset when they interview and do not feel that the position would work for them. I interviewed with them and felt they were a really good company with great offers. Could not take the job due to school conflicting hours.