It’s a horrible concept. Nothing in RL or even fantasy makes this type of diminishing returns logical.
- Does a wise/smart person learn or retain information at a lower rate?
- Does memory added to a computer diminish when you add more?
There are tons of examples, but it’s easy to see that CCP’s motivation (as always) is all about the cash. They’re too near-sighted to see that they would make more money in the long run by making injectors 1/1.