I agree with most of the criticisms made above. The idea of whether or not a person wants a receipt being the only "truly random" event in the whole universe just seems a little too jokey for its own good. Like, haha, yes, everyone can relate because in real life everyone basically answers this question randomly when we're at a store. But that joke is the entire conceit of the article, and I just don't think it's enough. I think an event that is really, truly, anomalously random is an interesting seed of an idea, but it would need a much more rigorous treatment than this article gives.
I also agree that some of the writing seems un-clinical- maybe it's just me, but phrases like "studies that revolve around" and "truly random thing" don't read like something that would appear in a scientific document. Due to these issues, I had to downvote.