Sometimes we need to evaluate the situation differently... mprep as mod yes you did the right thing from your end since you evaluated the op and the topic from "Alt coins giveaways + low effort task" perspective. But in reality the OP never had any of such intention. His topic was purely for the betterment of “Bitcoin”... he just tried his own way of realizing Elon that what he is portraying against bitcoin is wrong. That's why you see so much sentimental support from bitcointalk members for him.
I agree and rules are quite strange because there are so many giveaways in that section that discuss the prize in BTC and might be paying out in USDT (which is a altcoin, we know) but just because OP made a mistake of mentioning LTC, he got a ban. It hurts eve more when someone as sincere as Royse777 was working with him because if there was slight doubt, it would be Royse777 who would have made it clear.