PS1 Memory Card
The PS1 Memory Card fad originated with a thread by the user willsnotgay, in which he was unsure how to save PS1 games while playing them on his PS2, and decided to ask the Vesti for help. The thread was immediately hijacked by a stream of users who proceeded to inform him that he needed a PS1 Memory Card in order to do it, because a PS2 Memory Card would not work. The thread would quickly spawn several pages, with each post saying basically the same thing.
The joke indirectly addresses the inate habit of a Vestibulian to think the world revolves around him/her and not even consider the fact that what he/she is about to post has already been posted 12 times. The joke was led in most part by the user schizogony. The PS1 Memory Card fad has since become synonymous with him.