Both planned and unplanned, focused and rolling. I got hit with a series of "prove you are not a robot" prompts over the last week, then suddenly I couldn't access the site for an hour and now it's fine.
I suspect they are under attack from a massive botnet/mining net as a lot of people I know were commenting on the "prove you are not a robot" nonsense.
We were reading about the rise of sneak-mining rigs that have been installed in people's phones and tablets and computers, any time it detects an idle state it fires up and starts mining crypto for whoever is controlling it. Once that becomes mainstream news that's going to be a fun one to explain to the dumbtardens. "no see, Gramps... someone is using your equipment to generate imaginary coins that don't really exist yet are worth millions of real world dollars. That's why you have to install this update..."