1 PADI certification courses will cost you $300-$400 and the training will usually last from 2-4 days. 2  The participants will be in small numbers, such as 8 people or less, to ensure quality training. 3  According to the site ScubaMarcos.com, the price for the scuba classes can range anywhere from $350 to $450.
World Ventures is an illegal pyramid scheme. The company World Ventures markets memberships in a travel club that will provide discounts on vacation accommodation throughout the world. These holiday are sold through the company Rovia. World Ventures also offers these memberships to sales representatives.
There is a very fine line between a multi-level marketing company and a pyramid scheme, but suffice to say, most of your major supplement providers operate on a basic MLM model. These would include Herbalife, Reliv, AdvoCare, NuSkin, Protandium among many others. While they are not illegal pyramid schemes, they have their own issues.