No one will ever tell you, except for the porn actresses themselves. They choose different tactics: Mia Khalifa (once a Pornhub superstar) downplays it in interviews and says she never became a millionaire. Russian superstar Gia Lissa has mentioned in interviews that she earns more than all the Vixen models, and a fan even gifted her an apartment in Moscow.
The average salary for porn actresses is quite standard. A recognizable actress like Valentina Nappi charges around $1,000 for a scene with a man. It's unlikely she does 500 scenes a year. Meanwhile, Sabrina Deep has said that an actress with a business plan, boosted social media, an active career, merch, and fans can make six-figure sums annually. But such actresses are rare.
For male porn actors, there’s no minimum wage. In the US and Europe, thanks to unions, they have minimum salaries and some kind of guarantees. Hence, there are reports of minimum earnings, though they are hard to trust. According to these reports, porn actresses make between $50,000 and $200,000 annually, depending on the city and their popularity.
So every time you see posts or articles about porn actress and actor salary rankings, know that you’re looking at speculation.