In light of the MR-WPA dispute, lots of speculation about how many great players a topnotch pro tour could support.
All of them, if they were willing to pour millions and millions of dollars into the game, without concern of profit. Think "Sinquefeld" family in chess, which stood up a top notch facility in St. Louis, and gives money to chess tournament prize funds.
All these players are somehow supporting themselves right now. How do they do it?
For those outside of the top earners, they couch surf, or they have someone directly supporting them, i.e. trust fund, or significant other. Jose Parica's wife has money, and for quite a while she was funding his pool adventures when he wasn't earning that much.
For players in the Phillippines, they gamble with each other, and the tier1 players make a pretty decent living, for at least some period of time, until they kill their action by playing too good, and have to start travelling to larger events. Only a percentage of THOSE folks end up making it big on the international stage. And even those (like Orcullo) supplement their tournament winnings by being stone cold, rock hard gamblers who give crazy spots to amateurs while at bigger events, and outrun the nuts.
Some in the U.S.A. who really dedicate themselves to coaching and live in a state where they can cultivate a number of people who take lessons regularly, can make a "passable" living. But really.. The main pros making any decent money at coaching are attached to high-rent pool halls with clientele with too much money, and are "house pros". Think: Tony Robles.
Finally there is social media and marketing. Gorst, for example, sells a lot of autographed paraphernalia and the like. But this does not appear to be a lucrative venture for most.
Some like Niels Feijen, once they get too old to consistently take down top tournaments, turn to putting out content in a paid manner, or trying to build some sort of training app like Ralf Eckert that returns passive income. Niels started WAY too late with this, and should have started doing this 10 years ago, AT LEAST. Ralf Eckert's app caters to German speaking customers (though he may have language options now), and was funded by his owning one of the best pool halls in Germany, one of the first ones to put in Diamond tables.
Gorst has his head screwed on straight and is trying to get started on his social media presence early, while he is making a ton of money. Now that he is a U.S. citizen, he needs to get with SVB and get some guidance, as I would bet that SVB more or less has all the real estate investments he'll ever need, even if he retired right now. SVB's family really guided him well in his early success, about what to do with that money. Unless something amazing happens with Matchroom, I don't see a pure Youtube related strategy ever working for a pool player. But SVB also got into the real estate market at the right time, before housing prices shot up as a result of hedge fund managers buying up huge real esate portfolios.
Along those lines... Some players are smart and simply invest in either pool halls, or other business opportunities while they still have some money.
Dennis Hatch - Steakhouse/bar
SVB - Real Estate
Pete Margo (60's/70's 14. player) - Invested in a brand new VCR tape rental market, and became a millionaire
C.J. Wiley - Promoted big events, and owned multiple pool halls
And I am sure that there are a few other rare instances of American pool pros that had the sense to invest in something outside of the pocket billiards world, before they hit their 40s and their vision/nerves started to go...