What makes things/memes "trend" on twitter?
kyro: For the Facebook bra color meme, I think the mysterious nature of it all helped give it momentum as many people didn't quite understand what was going, leading people to either post a color to mock the situation or ask around to find out what exactly was going on, and then posting a color to taunt others who weren't part of the in-crowd. Mauve, by the way.If there's any way to engage Facebook users, it's to give them a feeling of unique purpose that can be broadcast to others in a subtle and unintentional manner.