I'd like to add that this issue also occured similarly for me today
on the [GIMP nightly builds site]. At least there were ads for a
Windows installer and training. This particular ad might being
harmless as long as one knows the backgrounds, but other users could
easily be led astray.
Using an adblocker filtered the ad properly out.
[GIMP nightly builds site]: http://nightly.darkrefraction.com/gimp/
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