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The more diverse the ads sizes the better when combatting ad blindness and adblockers.I agree, but that wide ? It's a bit excessive IMO. I cannot see it displaying well on some platforms.
For text ads: why not make them whatever size we chose ? Would make most sense if you look at "responsive design" etc.Yep, I am up for that too.
I didn't even know there is a 970x90 banner. Since it's quite new, and advertisers haven't added the new size yet, they are serving 728x90 instead.