I assume you'll only be able to legally use these logos on your products and packaging if you actually pay for certification. Most USB devices/charges/etc aren't certified today, I don't see this new logo scheme changing that.

Certification costs money, and you might fail. No consumer really cares (or probably no consumer understands) what buying a "certified" USB thing even means.

If your existing USB things don't have the red white and blue USB logo on them, they're not certified. Info: https://www.usb.org/logo-license