Just use a temp email: https://temp-mail.org/en/
"Price discrimination is a commonplace practice that is presumptively lawful, save under special circumstances discussed below. It occurs when a seller of products regularly offers lower prices to its preferred customers and higher prices to the others when selling them the same or similar products at around the same time."
https://www.markhamlawfirm.com/law-articles/unlawful-price-d...
In August 2021, a putative class action complaint captioned Williams v. Udemy, Inc., Case No. 3:21-CV-06489, was filed against us in the U.S. District Court for the Northern District of California alleging violations of California’s unfair competition and false advertising statutes as well as the California Consumer Legal Remedies Act in connection with the promotional “strike-through” pricing for courses offered on our platform, alleging that the reference prices used for comparison purposes are false or misleading. The complaint seeks injunctive relief, unspecified damages, restitution and disgorgement of profits. We are in the process of investigating the claims alleged in the complaint and have not yet answered. We intend to vigorously defend ourselves in this matter.
I just add the courses I want to the wishlist, logout, wait a few days, and when I sign back in, I get all my wishlisted courses for 90% off
>We incur content costs in the form of payments to our instructors, generally determined as a percentage of total revenue generated from their content.
This is a pretty typical structure when unit costs are low. It gives the publisher the ability to price as they please to optimize revenue, and because the inventives are aligned, authors don't need to know customer willingness to pay.
It's just a form of price discrimination. If you're paying and not urgent, wait a couple weeks and the price is $10. If you've gotta have it now, or don't care about the money (e.g. work will reimburse), the price is $100.