They've not shipped this. They're planning to. You're reading a marketing piece about work in the pipe. Like so, so many other company product "launches" in this space that are "already testing with a small group of whatevers".
Launching to 10000 people vs 10000000 is a matter of scale (which is still important, but not the same thing as), not velocity.
The numbers are also completely made up, used to illustrate the point. Launching a product to X users is different than scaling up to X*1000 users, if that makes you feel better.