But the OP's article seems to measure very different things: gpt-3.5-turbo-0125 writing stories and gpt-4-0125-preview as a writing critic. I've not previously seen anyone concerned that the newest GPT-3.5 has a tendency for laziness nor that GPT-4 Turbo is less effective on tasks that require only a small amount of output.
The article's conclusion: "my analysis on whether tips (and/or threats) have an impact ... is currently inconclusive."
FWIW, GPT-4 Turbo is indeed lazy with coding. I've somewhat rigorously benchmarked it, including whether "emotional appeals" like tipping help. They do not. They seem to make it code worse. The best solution I have found is to ask for code edits in the form of unified diffs. This seems to provide a 3X reduction in lazy coding.