I don't know anything about CABi but Melaleuca is direct sales too. There are several ways to do network marketing/direct sales: 1 on 1 appointments, or parties/events. I can tell you that you cannot make money from your kitchen table in direct sales - you have to work directly with people!
Direct selling is honorable and the way things used to be done before big supermarkets and box stores eclipsed even the small businesses. Think Fuller Brush, Avon - when salespeople went door-to-door. Even the milk and bread delivery used to be door-to-door.
If you are evaluating any direct selling company, be sure they are members of the Direct Selling Association (which is by invitation only to the best, scrutinized companies). You can find their member list on line.
You also don't make money unless you have other people below you who are selling - there are only so many people you can reach on your own. There are ways to evaluate the compensation plans as well - you do NOT want a binary plan where you only sponsor 2 people and then wait for them to sponsor others, building evenly. If one of those people stalls, you stall. You want to be able to go as "wide" as you want - as many people on your first level as you can get. And you want to be able to go "deep" - being paid at least 5 levels deep on the people you sponsor and the ones they sponsor.
You also want to be sure you have a compensation plan where you can make more money than the person who sponsored you, and where money doesn't bypass you and go up to the upline sponsor if your people don't do what they hope to do (which happens all the time in a binary system). Make sure that commissions never go back to the company either. Happy to give you more info on this.
You also want a consumable product so people are ordering every money - the product has to have value, be better than what else is out there, and be something that people get excited about. You also want a broad-spectrum product. For example, MaryKay is a great company (and in the DSA) but your market is women, and only women who wear makeup and use skin care. You don't market to men or families with children.
Don't let anyone tell you that direct selling is a "pyramid" - it's not. Pyramids are illegal, first of all. If a company publicly trades on a a stock exchange (NYSE, NASDAQ, etc.), it is not a pyramid. Pyramids only make money for the top people, and all the little people do all the work. In fact, most economists say that corporate America is a true pyramid - the CEO gets the big bucks, the VPs get medium bucks, and the workers get less and less, and have no hope of ever rising up the ladder. Think WalMart or AT&T or Microsoft. Those workers get a salary, period, no matter how many hours they work. In direct sales, you make according to your hours - you have to work smart, for sure. You can't get fired (unless you are dishonest and the company cancels your distributorship), and if you want more money, you work harder.
And make sure there is no monthly minimum - there ARE companies that do not require that. You also want a money-back guarantee or something like a 90% 1-year buy back.
But it's work. It's a relationship business. You have to be entrepreneurial or it won't work.
Let me know if you need more info on direct selling or how to evaluate the compensation plan.