Then online casinos are a bad business and shouldn't exist, just like breweries shouldn't exist if they can't break even selling to casual drinkers and need alcoholics to make a profit, and gun manufacturers shouldn't exist if they can't break even selling to one-or-two-gun owners and need wannabe-commandos and survivalist cosplayers to make a profit.
I worked at a biotechnology company, we had thousands of clients but five of them were 80% of our revenue. In your world, should that business not exist as well?
I don't understand the princple that revenue should be uniformly distributed as a condition for existing. How would you enforce this?