Is it real work? Are you given a wage or a commission? Do you have to spend money on seminars, weird fees, or incredibly useless how-to books published by the organization?

Naturally there is an incredible prevalence of scams in marketing and sales, since the same skills for a confidence trick are used to make legitimate sales.

I would say, make sure you get paid, get the money, hold on to the money, and don't spend a single cent on anything they claim you might need.