It's always been that way
Read the fine print. It's still going to be free as long as you use the GPL. But if you plan to ship a product that incorporates MySQL, and you'd like your product (and your MySQL enhancements) to be proprietary, binary-only products, then you can buy a license and do so. IOW if you only use MySQL it's still free. If you distribute MySQL and include/offer source, it's still free. If you modify and distribute binary-only then you need a license.
===
Implicitly condoning stupidity since 2001.