MLM is permissible or not permissible
It is haram to participate in the multilevel marketing scheme mentioned in your question, because it is based on gambling. This applies to marketing in which it is stipulated that the marketer must pay a subscription, or must buy a product or shares or anything else. Gambling is a transaction that is based on certain loss and possible gain.
Marketing that is accompanied by crypto currency or mining is a haram kind of marketing, because a person cannot do any marketing thereof unless he pays money, whether it is called a membership fee, the price of an item, the value of a share, or any other name it is given. This is money that is paid in the hope of earning more by inviting others to join the scheme, which may or may not happen. This is the very essence of gambling, and the product is just a trick, or is sold for an inflated price, and the purchaser is happy to pay extra in return for what he hopes to get of fees for marketing. These fees are what is sought, and they may be the only aim of the investor.
Complete Answer: https://islamqa.info/en/answers/348232/what-is-the-ruling-on-investing-and-marketing-in-the-silwana-diamond-company
