Basically, exactly what everyone said here.
However, there was this one job interview I was invited to and I decided not to go on the last minute because I found some information about the company I didn't like. Basically, their website offered like $15/hour, but I found out thru some forums that this is a commissioned job and you gotta find clients and go to their homes to sell the products and also you have to purchase your own display model for the product.
So when I canceled the interview, they told me I was being rude and extremely unprofessional, lol.