Fairislecable
I don’t know how the system works but I reported some spam posts earlier this week on both Mumsnet and Gransnet. The Mumsnet ones were immediately disappeared but the Gransnet ones were not.
In both cases I was sent an email to confirm they were looking into it!
I don't think GN has any of its own staff or moderators now, as it used to years ago.
Probably someone pops over from Mumsnet occasionally.
However, I do realise how difficult it is to block determined spammers.