Even the article says it isn't. "we want to note that the sample of the present study probably is not representative of the US as our study is restricted to th

Even the article says it isn't. "we want to note that the sample of the present study probably is not representative of the US as our study is restricted to the specific sample of Amazon Mechanical Turk workers and has a relatively small sample size for an online survey. Thus, one cannot make inferences about the entire population of the US (or other populations of other countries)" plosOne is unfortunately fairly gamable with this sort of thing.