You're right, in this case the https will fail and this will indeed (mostly) slow down loading of Ads. I was wrong - although, personally, I do not observe slow

You're right, in this case the https will fail and this will indeed (mostly) slow down loading of Ads. I was wrong - although, personally, I do not observe slower loading times for pages, even though some ad-urls are failing. There are indeed some very rare pages (like zdf.de) that won't load at all because they have a very aggressive ad/surveillance checking.