Vector is not a scam.
However, they are not the greatest company to work for. They offer you unpaid training as you are an independent contractor, a kit of knives at a rate: you either rent it, pay for it or borrow it depending on where you live, and then they inform you that you may only sell to people who you know.
Therein lies the "scam" part about it. It's not truly a scam. You offer a product, the person then chooses to either buy it or not. If they buy it then you get a commission and they get some knives. The problem is that you are only able to show the knives to people who you know. This causes a conflict of interest: The person you are offering the knives to KNOWS you so they will be more inclined to BUY the knives just because they know you.
The knives they offer are inexpensively made and highly priced items. They typically employ a serrated blade (which equates to saw action rather than slicing or cutting action) and that means you do not have to sharpen them. Actually, you can't sharpen them without paying a Cutco representative or sending them in to the company. They're great in that regard because you don't have to maintain them day to day but they stink in the same regard because they're not really that sharp.
There is quite a bit of controversy over Vector. In the past they have had poor and deceptive recruitment practices. They are a multi-level marketing company (basically a legalized pyramid scheme) so it seems like it's a scam. And with people telling you that they've made a couple thousand bucks in a month without barely lifting a finger, I'm certain that your eyes are glimmering with delight. Keep in mind that is definitely the "*Results not typical" that you always see in those weight loss ads.
My brother's girlfriend just started working for Cutco a week ago. I am a salesman of nearly 8 years now in various fields (mostly consumer electronics) and I can tell you her sales work was nothing like mine. From what she told me it was rather easy to represent the product because again, you have rapport with your clients. In the real world of sales, you are generally meeting people for the first time in a store or making cold calls to people you have never met. It takes away a bit of the edge (no pun intended). At any rate, she had a handful of appointments her first week and now she's not so hot-to-trot about it. I think it's because originally she was told she could work at her own pace but now she's being told she has to make daily reports to the main office about how many appointments she's set up. She also felt very high pressure and she is not the kind of person that likes to be under constant pressure. So she's kind of bummed out about that.
So to answer your question: Is Vector/Cutco a scam? No. Is Vector/Cutco a good company to work for? They have a poor track record, but they give you a paycheck. And a paycheck is often times the most important thing you need to live.