The original r/AskReddit thread ("What feels illegal, but isn't?"): https://www.reddit.com/r/AskReddit/comments/aszfh3/what_feel...
The Buzzfeed repurposing of that thread ("19 Things That FEEL Illegal Even Though They Definitely Aren't"): https://www.buzzfeed.com/stephenlaconte/if-you-have-a-guilty...
And a r/mildlyinfuriating thread about Buzzfeed's repurposing ("Buzzfeed blatantly copying their articles from AskReddit threads"): https://www.reddit.com/r/mildlyinfuriating/comments/axb6cw/b...
As the r/mildlyinfuriating discussion points out, the Buzzfeed article is both prefaced with the origin — i.e. "This week, a Reddit thread asked users that very question..." — and a link to that source. And each item (i.e. Reddit comment) is attributed to the Reddit user (e.g. "Walking out of the store without buying anything." —lassissal), and a link back to the user comment. Plagiarism is the act of claiming authorship for someone else's content. Buzzfeed's profit-by-curation may be distasteful, but it's not plagiarism.
In any case, I think the average person understands that Buzzfeed is an aggregator, with a mission to get clicks and to entertain. Stealing content is wrong no matter what, but it isn't a direct contradiction of Buzzfeed's purported core purpose. Snopes' purported core purpose is to "have the real facts", and that purpose is directly undermined by lying about others' work being your own.