NEW YORK ( MainStreet) — Belle Knox is changing the subject.

The porn star and Duke University sophomore, née Miriam Weeks, has written an essay for Time decrying the loss of her financial aid and arguing that college tuition has been driven skyward by "artificially inflated demand."

Weeks became famous for going into porn in order to pay her way at Duke, where tuition and fees currently cost $45,620; room, board, and "books and personal expenses" are listed on the university's website at $6,354, $5,850, and $3,580, respectively.

Weeks's financial trouble began, she told Rolling Stone , when her father was called by the Army Reserve to go to Afghanistan. A former military doctor, he had to leave his job at a private practice for a wartime post that paid less than half as much. According to Weeks, Duke declined to alter her financial-aid package — "They didn't care," she said — leaving her with a monthly bill of $4,300. Rather than take out a private loan — the option that has proved financially debilitating for so many Americans — Weeks entered the adult entertainment business. The revelation of her double life — student at a prestigious college and featured performer in the seedier corners of the Internet — became national news in February.

Now, Weeks says, her income is high enough that she has become "ineligible" for financial assistance from Duke. Without the $13,000 she previously received, Weeks faces a bill for next year of $62,000. "And I will pay this all on my own," she adds. "The financial aid office does not care that I am legally financially independent. They view it as my parents' responsibility to foot the bill."

Weeks doesn't say how much money she's making, or specify the sources of her income (beyond the category "porn work"). But her X-rated scenes have led to several commercial opportunities: according to the Rolling Stone profile, Weeks will host an online "reality" competition called "The Sex Factor," and she has a deal with Doc Johnson for a line of sex toys. She took a paid PR and marketing internship with the website PornHub — "Some people just don't have the privilege of taking unpaid internships at law offices," she told The Daily Beast — and her media appearances include a booking on "The View."

Weeks draws a connection between the market forces that allow her to make so much money in porn and the societal conditions that have propelled college tuition so astronomically high. (The cost of a college degree in the U.S. has increased by 1,120% since 1978, according to Bloomberg, "four times faster than the increase in the consumer price index.") "Demand for porn actresses, especially extremely young ones like myself, far exceeds supply," Weeks explains. "How interesting that the same basic principle explains why my tuition bill is so high in the first place."