loyce's and bpip's scraper also seems to be down? (paging @LoyceV, @suchmoon, @ibminer).

True, I can't scrape anything - getting 503 errors.

Strange it may seem but this is what I figured out for now if you navigate to https://bitcointalk.org/index.php you will still get 503 error. However if you navigate to to any other page or only https://bitcointalk.org/ it bypasses Cloudflare

For example:
https://bitcointalk.org/index.php Error 503
https://bitcointalk.org/index.php?action=stats Error 503

https://bitcointalk.org/index.php?action=profile;u=1634314 200 OK
https://bitcointalk.org/index.php?topic=5422131.0 200 OK
https://bitcointalk.org/index.php?action=merit;stats=recent 200 OK

I think only theymos can guide here more.