In ancient rome, gambling throughput was low (it required presence and physical intervention), so the house had to have very favourable odds. Internet-based gambling allows for HFT, which allows the house to operate at lower odds. Basically a 24/7 gambling experienced, with user funds being surgically extracted at the calculated optimal level to guarantee the house's max-profit. Historically vices were limited due to geographical, and economic limitations. The internet now allows addiction-prone humans to indulge to the max. Casinos are forever. Adjust your portfolio accordingly.