..."Twitter is not intended to become a marketplace, it may set the stage for community members to interact and connect consumers to the products they need."...

That last sentence spoke directly to me.

Twitter has been developed with communication as its primary focus, it's a way to post quick notes in a public space that friends can read to keep up with each other. This could be used as a recommendation system amongst friends but it doesn't feature any kind of online sales capability, doesn't feature any kind of ability to search for products or retailers, and basically hasn't been designed with shopping in mind.

I own a social shopping site called www.marketplacestories.com.

Our focus is explicitly on shopping and stories about events in the global marketplace. We let users post stories, shop, and review products and retailers. We have designed our site from the ground up to support a forum to connect consumers with the products they're researching and actively looking for.

Twitter may be used as a method of conducting offline sales but it was never designed to be an effective online marketplace.

Thanks for your perspective, binkyCham !