This should not be a surprise because Amazon does this every year. Fulfillment by Amazon US FBA and referral fee changes are coming in February 2019. For complete details, visit amazon.com/selling-fee-changes. NOTE: You must be logged into Seller Central to see this page.
In other news –
Have you heard that Amazon founder and CEO, Jeff Bezos, is getting a divorce. Since he lives in Washington State which is a community property state, his wife, MacKenzie, will get 50% of Amazon. Jeff will drop from the richest man in the world to 6th richest.