There was no penalty levied on Dell for being involved in bribery.
Meaningful in that it cost intel $billions instead of $millions? The acts however were the same in every case - bribing OEM's not to use AMD. The only difference is the EU isn't weak against abusive monopoly corporations like the rest of the world is.
AMD concocted these allegations to get out of their Cross Licensing Agreement with Intel.
Intel denied ever doing what AMD alleged, so chose to formally agree to not do what they weren't doing anyway.
Since that time, how have Intel and AMD done?
If AMD were being held back by these supposedly rigged rebates, then with that no longer the case, then they should have prospered and Intel suffered.
Instead, we have seen Intel take Market Share off AMD, hand over fist and AMD now on Life Support, unlikely to survive into the next decade.
AMD's problems have overwhelmingly been incompetent managers, who of course weren't going to accept the blame for their ineptness, so they just blamed Intel and the gullible lap it up.