> Those very conflicts of interest would, under normal circumstances, force folks to question the nature of the research and the quality of the results.

The fact that someone has a conflict of interest should be stated, certainly. But we should always question the nature of research and the quality of results. In one of these cases, it doesn't even seem that a research paper was being purchased but simply an essay, which presumably would not be cited by anyone or even considered a presentation of facts by other scholars. But in any case, we shouldn't assume someone's research is honest and valuable just because he doesn't seem to have an economic conflict of interest. There's a lot of bad science done with deliberate intent to deceive that involved no such conflict of interest at all.

The bottom line is that science is not being nearly tough enough on itself, and the results are what you'd expect: a lot of bad papers that are either useless and irrelevant or full of lies, errors, and fabrications. Reporting conflicts of interest might help a little, but it shouldn't be used as a cover for gullibility.