https://en.wikipedia.org/wiki/Income_share_agreement
> An income share agreement (or ISA) is a financial structure in which an individual or organization provides something of value (often a fixed amount of money) to a recipient who, in exchange, agrees to pay back a percentage of their income for a fixed number of years.
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> Common Concerns Indentured Servitude
> However, advocates of ISAs contend that since students have no legal obligation to work in a particular industry, and since it is illegal for investors to pressure them into a certain career, students are no more “indentured” than those with a student loan. In fact, someone with a traditional student loan has less choice than someone with an ISA, because the student with a loan needs to be in a career where they make at least enough income to cover their monthly payment, whereas someone with an ISA can choose to never make any money, and would never owe the investor a dime.