It does make me curious. I'm done with the Pathfinder 2 playest, but still wanted to get some pawns from Paizo and keep up with their miniature news. Their website being down for so long is unfortunate.
It's easy to see conspiracy theories.
They website is being hit by DoS attacks because people don't like the playtest.
Paizo is keeping the website down to pause the conversations and let people calm down, so they'll be nice to their game, as well as stymie negative publicity.
I don't think it's people downloading the playtest. That killed it the first day, but after that demand would slow. They could be having issues with how it watermarks the documents and working on that, but that doesn't seem something they'd put the whole site down for. They'd just remove the watermarking like they did now.
My guess is it has to do with the backend code of the website itself.
The Paizo site just got a new facelift, but that was pretty much just a cosmetic tweak of the old site, and a lot of old elements and formatting bled through, and all the old content was retained. They didn't want a hard reboot that removed all the old blogs or wiped the forums.
But given they were running a site that hadn't really been update for a good decade and then added a lot of extra stuff on top, that probably made the code unstable. I know the site was slower than the old and finicky. I kept finding dead links and poor redirects. Navigation was not easy.