[edwinnathaniel]

What needs to elaborate? You 'spam' the groups with "new items, coming next week, here's the pic and price"

Something similar to this: http://storify.com/cbccommunity/kuwait-entrepreneurs-use-ins...

In the old days, you sent SMSes but you can't spam multiple people at once. You can only send one SMS at a time (unless you program something, which Housewives don't do...)

BBM supports Groups already but it's kind of slow (at least the old BBM anyway). I don't know if WhatsApp is any faster or whether WhatsApp has any limit on how many Groups member you can have (because it is essentially almost like Twitter).

[krexit]

There's a 50 user limit in a WhatsApp group.

[rachellaw]

different poster (singapore)

50 is a good number of people, especially if you're doing sample sales i.e. 1pm - 4pm special sales in a secret location by XX designer. For instance you can whatsapp a group of well-known fashion bloggers, who may forward the invite to a group of friends etc etc creating a semi-exclusive shopping experience

I've seen people do it for yard sales too (what we call void deck sales) It's a bit like a tupperware party.