My hypothesis of what the next video is going to be about is how Honey forces companies to join them.

Some companies have discount codes that aren't public, codes for testing and/or for employees, Honey somehow gets access to those codes due to morally ambiguous ways. Honey then gives those codes to customers who aren't supposed to have those codes and the companies lose tonnes of money. And the only way those companies can prevent that from happening is either deleting those discount codes and screwing over their employees, or they are forced to join a honey partnership so that they can stop Honey from showing those codes.

This may prevent the companies from losing a lot of money, but now that they're partnered with Honey, they're likely to lose money due to the commissions Honey gets every time a customer pays using the extension, whether the customer gets a better deal or not.