* Don't allow advertising for it, period. * Standardize the UI. No animations. No cartoon characters. No flashing, sounds. It should look more boring than Crai

* Don't allow advertising for it, period. * Standardize the UI. No animations. No cartoon characters. No flashing, sounds. It should look more boring than Craigslist. No A/B testing. No hiring psychologists to "optimize" the UI. * No "retention team". No freebies, kickbacks, offers, comps. * Implement a voluntary ban list, and enforce it strongly. Someone that decides to ban themselves from gambling for life should be unable to bet even a penny. * Setup a "qualified gambler" program, similar to "qualified investors". You can bet $1,000 per year, or 20% of your YoY growth in net worth, or 1% of total net worth, whichever is greatest.