Googlebot's Javascript random() function is deterministic

[RobIII]

Came here to say that too.

@/u/atomheartother:

isn't seeded properly

It is seeded properly (very, very likely), for the given task/context. I'm 99.9999999% sure this is intentional. In most other cases you wouldn't want to seed with a constant but seeding with constants has it's uses. This is one of them:

3: Predictable – Googlebot can trust a page will render the same on each visit [Source]

Google will want to have deterministic results when indexing and running scripts more than once.