The 24-year-old grad student earned $6,500 for her first egg donation, which almost covers her entire first year of school. A couple more egg donations will leave her with enough money to pay the full cost of the program — around $15,000.

“When I worked a second job [between college and graduate school], it took me almost a year working in retail to make this same amount I’ve already made from one egg donation,” she said.

One 21-year-old student said she receives a monthly allowance from a 37-year-old “sugar daddy” she met through online dating site SeekingArrangement.com, which helps rich men find young women who are looking to be supported financially. In exchange for her company, she says her sugar daddy has been making her full tuition payments of $1,500 each month.

According to SeekingArrangement, that allowance is low compared to what most college students on the site receive. About 41%, or 350,000, of the sugar babies on SeekingArrangement.com are college students, and two-thirds of them say they are using their sugar daddy as a primary or secondary means of paying for college — receiving an average of $4,200 a month for college expenses, according to the company.