PT. MAS ALAM SEMESTA offers a business opportunity selling gold through a multi-level marketing model called Integrated 3D System (i3DS). To become a dealer, one must provide their ID card, phone number, bank account information, and heir designation. Dealers earn commissions through direct sales and by referring others to become dealers themselves. The document provides examples of potential earnings through commissions at various referral rates with a starting investment of Rp 3,600,000. There are also reward programs to accelerate sales.