Shoppers team up for better deals
Chinese shopping craze: consumers meet up in shops at a coordinated time, literally mobbing the seller and negotiating a group discount on the spot.
You ask why? - well since the beginning of time, People (that collective of folks out there living in the world) have always had power, but rarely do People realize it, let alone use it. Now that power can be used for good or bad - in this case, the power is used to get a better price.
Think about this, we all live in and around people, we go to worship (there are people there), our kids go so school (ah, more people) and we go to work (usually people there) -- are you seeing a pattern here?
We collectively have lots of power, I as an individual have limited power (as compared to People). Now, I'm not advocating a "borg" mentality - that everything is for the collective and nothing is for the individual. I'm just saying (don't you love that phrase?) that we belong to lots of communities of interest, and the whole is greater than the parts.
Besides, I like getting a deal just like the next guy.