@Piru
You did reduce the quality a bit, but certainly not enough to keep it from being able to compete with the (potential) commercial purpose of the original artwork.
The original is 1504 x 1152 24bit.
The version in the embedded animation is 627 x 480 256 color with heavy dithering (due to shared animation palette).
If that isn't quality reduction I don't know what is.
You also did not need to post the entire image to comment on it
The changes would have been difficult if not impossible to explain without. There were already confusion earlier regarding how the image was modified.
Posting a quick reduced quality animation makes it easily obvious what I'm talking about. This falls within fair use.
I consider this matter closed.
Commodore USA however still continues to use the image in their marketing material under the label "Introducing our all new, all-in-one Commodore 64bit computers for 2010" and "2.66 GHz Intel Core I7 processor, NVIDIA GeForce GT 330M with 512 MB, 2 TB hard drive, 4GB DDR3 SDRAM, BLU RAY drive. Available late 2010".