Bob, your example in the other post is perfectly all right. In fact, if you upload the different front images for all the cards and use the same back image because each and every card you have is the same back, no one would know different unless there is a distinguishing mark on it and then, no one would really care (unless it is something contrary to our rules about marked or damaged cards). I would bet that most of us who have uploaded sets like this have done exactly that - if someone actually scanned every same back for cards he was uploading, well....
What we have seen are sets where it will show that 51% of the images are uploaded and when you open the set, it is all back images with one or two front images. This is what people are referring to which is intentionally done for "point farming" (having come from a farm, I like that term).
Bruno
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Check my Profile page to see my 2023 Goals and my Lists of sets near completion (5 cards or less) or sets getting close (less than 100 cards missing and 75% complete).
https://www.tcdb.com/Forum.cfm/Page/B/ID/0/?MODE=VIEW&ThreadID=25745&C=0