But here when that sort of thing happens instead of just being like "OK this was kind of fun at first but it's clearly stale now, let's move on" which generally happens on most internet communities the reaction instead is to double, triple and quadruple down on it even when it's about as fresh as Rickrolling and no one is claiming it has any humor value remaining (assuming it ever did to begin with.)
I've noticed the same thing on Reddit. The top comments are the ones that tend to appeal to the lowest common denominator, and so they recycle the same jokes over and over. At least we think of our own here, on reddit it's just movie and TV references that take no effort and get upvoted.