WTF is this large sticky ad in the middle of my computer screen?

[CoteDAzur]

It covers half of the post I'm trying to write. Then I 'preview' and it's there in the middle, covering the preview I'm trying to read.

There doesn't seem to be a bit I can click on to close it.

Did you really have to? We can try to collect some money among the regulars if y'all are so desperate for cash.

[SugarMiceInTheRain]

I've been getting increasingly annoyed with that too - the ad changes from one thing to another but it's really hampering my enjoyment of MN. Maybe a sign I need to get a life and dereg for a bit!

[CoteDAzur]

This is the first time I'm seeing it.

It moves about as I try to scroll so I can see the post I'm writing.

What fresh hell is this?