If not a scam, certainly not honest....

[WalkingOnTheCracks]

Dear Mumsnet,

I don't know how much control you have over ads that appear on your site, but you might like to take a look at this one....

Hi there @WalkingOnTheCracks . Thank you for this. You're not the only one to spot this and we're going to look at it straight away. In the meantime, could you possibly send us the url for this ad and the url of the MN page you saw it on? If you could even tell us which thread or part of the site you saw it on that would be great. We need to track down where it's appearing before we can do any more. Thank you very much for letting us know.

Aha! It came up again....

It appeared on the notification page....

And it goes to here...

https://die-immobilienbewertung.com/

....which, you'll notice, is made to look like a BBC News page....