Well, I don't believe the two go "hand in hand". Earl attracts a crowd, and pool hall owners LOVE that. And lets be honest, pools decline had NOTHING to do with how folks act while playing pool. If that was the least bit true, the NFL would be out of business decades ago, yet, it's a multi-billion dollar juggernaut.
Actually, in today's society, if they were more outrageous, they may get some ink. There is an old saying, "no press is bad as long as they spell your name correctly" We do live in a "Kardashian Cultre" today, and folks will watch a train wreck, heck, some even like them more after the tracks have been cleared of the bodies.
Sponsors only come when they can get something out of it. If nobody is watching, what will they get? If pool got good ratings, it would be on ESPN. The re-runs of events don't get good ratings and they are used as a "filler" only.
I play with some many folks that don't watch any pool, not on utube, not on a free stream and certainly NOT on a paid stream. If folks who actually play the game won't watch it, what chance do we have of getting non players to watch? There is the problem.
Yet, I can tell you how many folks I know that never played baseball, football, hockey or basketball who not only watch the games on TV but they spend hundreds of dollars to go to see a game in person.
We're a niche sport and we have to accept that. We are no different that Badminton, and some other niche sports in the US. So, just accept it and enjoy the game. Help bring in a few more "die hards" before we all "check out", so it stays alive