I think that AWS Reserved Instances will still be OK. That is purchasing a product with an expiration date, with the product being compute hours. And its mostly B2B, this article is mostly focusing on B2C. AWS will mostly be in the clear. Services are already billed per call or per monthly usage.

Usage-based will be fine, but if you sell usage-based with a discount that assumes the customer will stay with you for, say, 3 years - this law means they can leave after 1 and not stay for the full length.

Then, you've given a discount that wasn't in your interest to provide.

Does the law as written distinguish between B2C and B2B?