Many of the studies couldn't be replicated because the original authors didn't provide sufficient details in their papers, and then refused to reply when asked

Many of the studies couldn't be replicated because the original authors didn't provide sufficient details in their papers, and then refused to reply when asked for those details. Whether this is malice or not is kind of irrelevant - they have failed to meet the most basic requirements expected of researchers. They took the money but did not deliver the expected work artifacts.