Copying others answer is different by providing an obvious answer to the question for the giveaway. There’s only one question on giveaway like this so if that answer is already appeared on comment section and you know it’s true, would you still post different answer just to stick for not copying answering. This is common on giveaway like this especially on FCFS basis. But when I view the telegram post history, I just saw that the first comments is not the right answer. So the guy comment above missed the chance to give his entry for the right answer.
Its easy to judge if the answer is copy so I think the contest owner should properly scan the answers of participants so that they cannot get copied answer and announce the right participant who own the unique idea since having similar answers will not create any thrill since the answers are so common which might see from multiple users who want to ride the idea of other people.