The remaining 1% are those who are making a living from gambling.
That's means gambling industry are so rich because they take the 99% chance of making money compared to only 1% of their gamblers who make a living in gambling. I don't know what percentage exactly but I do believe it's possible to make a living in gambling and 1% is just too small, maybe like 5%, but like I said, I really don't know because I myself is not making a living in gambling although in the past I tried to find ways to make it possible, but failed.
Its hard to determine the rate, but it's easy to determine who really are making profit in gambling, and it's non other than the gambling operators.
Aiming to make gambling as a living is a hard job, maybe the hardest kind of job in this world as we know that majority of the gamblers loses over time.
If we have enough capital, maybe the easiest way to make a living in gambling is just to start our own casino or gambling sites.
Contrary to the popular belief , casinos don't have huge profit margin. From my experience , they have less than 10%, after they pay all the taxes and licenses, and taxes for these kind of business are quite high. Truth to be told,i worked in Europe where taxes on these things are quite high, some specific places like Vegas or Macau might have lower taxes.
So it is not so easy, to just open casino and make easy money.
Well, you don't pay taxes if you are not making an income, so basically those casinos who pays taxes are making, regardless of how high the taxes they will paid, they will still up profitable as the basic computation in account is (gross income, less, expenses, taxes, and net income).
This industry would also not grow if making business here is not profitable in general.
If a businessman have a capital, he might gamble in this kind of business, and if he can compete and make customers satisfied, then I think his casino will eventually become popular.