Okay, I figure I should answer this just so I can get it out there.
Bree made (or could make, there's a lot of people that exaggerate how much money they made in the industry) that much money because she basically perfectly timed her career. Tube sites (which is how everything because a Google search away) didn't really start to take over the industry until around 2011-2012 or so, which is right when her career ended (Sasha Grey had the same very fortunate timing). Before then, it was almost to the point where pretty much all you need to do was get a pretty woman and a camera and you could make money shooting porn. Because of that, there were a ton of small to medium sized production companies around that had the budgets to hire anyone they wanted. There was a ton of product being shot (arguably too much), and because of that there was a lot of work to go around. A popular performer like Bree could easily be shooting 3-4 scenes a week if she wanted, and be getting paid upwards of $1200-1500 per basic b/g scene (and more depending on what she added on top of that like anal or IR). That money is long gone. Most of those smaller and medium sized companies died years ago, and nowadays even the most popular performers are maybe shooting 2 scenes a week on average. Turnover is huge because most women, after their first six months or so, can't get enough shoots to make a consistent income from shooting alone.
Which brings me to my next point: the post-porn career. Okay, so first, royalties in porn. There aren't any because there really isn't enough money to go around. Outside of the companies that also own tube sites (like Brazzers/Mindgeek), most porn companies aren't really making tons of money, at least not enough to be able to offer performers a cut of the revenue (and if it were a cut of the profits, well, there really isn't much profit there). The best you'll be able to do is, if you spend the time promoting your scenes, you can get affiliate money from them (basically, if someone joins the site or buys the DVD off you promoting the scene, the company will pay you a little bit). If you're looking to transition out of performing, but have no qualms about sex work in general, there's about 4 workable post-porn careers (and the truth is that you can get into these careers while performing as well, and most performers nowadays already are). The first is going into production, which can be fickle and ties your well-being to the overall well-being of the industry, which, again, isn't great right now. Second is camming (which, by the way,
Bree Olson does now, or at least was doing for a time). It's the easiest way to make money off your notoriety without having to put up capital or rely on connections. Third is feature dancing, which requires actual ability as a stripper (which not every performer has), and the ability/desire to spend a ton of time on the road and basically lead a traveling lifestyle. Fourth is escorting, which can arguably be the most lucrative, but is also far and away the most physically taxing (seeing as it's basically continuing your career except without the camera involved). If you're not moving on to one of those four things, I hope to dear god you either have some money saved up or have someone willing to support you financially.