public suffix list: why isn't wordpress.com listed there?

Question

sorry if this is a bit off-topic. I'm using guava which internally uses the public suffix list. How come blogspot.com is there while wordpress.com isn't? (and also etsy.com and many others...)

I thought the purpose of this list is to help me detect that ihadanny.wordpress.com and highlyscalable.wordpress.com are not owned by the same person, while www.outbrain.com and traffic.outbrain.com are owned by the same person...

Answer 1

I'm guessing this is just because Wordpress hasn't submitted wordpress.com to the list as a public suffix.

Answer 2

The list comes directly from Mozilla's PSL, and they depend on authoritative reports from registrars and site operators.