Strange Black Bands appearing on Sitepoint

In the last week or so I have been randomly getting a black band appearing at either the bottom of my browser window or vertically in the left margin. There is a tiny grey “X” to close it, and I recall seeing some text but forget what it said.

An annoying extra click to see Sitepoint.

Also, it seems to go away sometimes on a page refresh.

I would say it is an advert and I have just done a test:
Microsoft edge - no advert ( logged in )
Firefox - no advert ( not logged in )
Chrome - advert ( not logged in )

1 Like

it is definitively an add.