pds41: Okay - that's not a pop-up. That's a pop-out. They are relatively new; I saw one a few months ago.
g2222: I'm not a web dev. To me it doesn't matter whether the ads pop up, down, in, out, left, right, over, or under.
Today, I got the third sales notification. Once again advertising games I already own. That's a 6-of-6 failure rate by GOG. Impressive.
Next time I'll do some inspection and try to find something distinct enough for an ad-blocker to catch.
Yeah, that's the thing. While neither this nor the ROKT ads are pop-ups in a "traditional sense" due to neither opening a new browser window, the end result is still the same. They still pop up on top of other content. Semantics and technicalities are irrelevant, we're talking about user experience.
I have also received several of these and it was also a 6 out of 6 failure in terms of them advertising owned games to me. Some may think that perhaps I have purchased those games very recently and something somewhere hasn't synced up yet, but that's not the case. I have owned these games for months, if not years. What makes it even worse though, is that in my case, they seem to be determined to sell me Hollow Knight, which isn't even on sale. If it was on sale, then it has expired a long time ago.
I like GOG and I want them to succeed as much as possible, so I honestly do not even mind these pop-ups, but what I do mind is their content. They keep advertising owned games and they are unaware of what's actually on sale.
It might indeed be useful to know if a game that meets our tastes is about to lose its discount, but these ads need to be accurate.
Apply the "Show only discounted" and "Hide all owned products" filters to these pop-ups. Then they may actually be of some use.