Not letting you unsubscribe to an email marketing list is effectively placing your company on the same level as spammers. Sadly, some companies don't care about that, because all that matters is the next sale.
The U.S. FDA recently issued guidance on recommended sodium reduction for food manufacturers, stopping short of actually making it a requirement — yet another example of the U.S. government bending over to business at the cost of hundreds of thousands of American lives each year.
When companies hide their prices, it's clear all they care about is the sale, not the product or the consumer, and this should immediately turn you away from them.
A discussion about invasive technology, in particular Google Drive forcibly installing itself without my consent and using custom notifications that deliberately avoid the Windows notification API so they ignore system settings.