Nah, i do not know him and i do not give merits to anyone on the basis of knowing him/her, to be honest, i have no idea that the op has copied it directly from any source because if that's the case then he would be banned till now,
Quick lookup and this is the first time you interacted with OP in terms of merits so I believe you.
However I would suggest double-checking in the future as OP posted the source at the end of their post. If we're talking about plagiarism, I doubt they will get banned for that since they posted the source. It's also not instant and could take time since it typically needs someone to report it. But it doesn't change the fact that this is an extremely low effort post. Op most likely wanted to fish merits by lifting a finger and hoped someone would not notice and bite.