Bill Clinton's gotten a heckuva lot more from single speeches.
Bill Clinton sold the Chinese the capability to put men in orbit (and a payload anywhere), among other things, disguised as 'trade deals'. That builds a considerable annuity.
It remains a transfer of wealth from student activity fees and grants (both fed by either taxpayers dollars in the form of student loans or grants or by 'gifts' from wealthy donors) to Liberals.
How many conservative speakers have been denied even the opportunity to speak on college campuses of late? The money is being funneled to the Liberals, ultimately from taxpayers.
It's a thinly veiled money laundering scheme, imho.