[Animats]

This is sort of what Google Shopping was before it went all-ads.

[opendais]

That isn't quite right. Many vendors provided them with XML feeds of their products just as they do with Amazon.

[razvanr]

Correct. We don't get any input from the retailers. Two Tap can get product availability info and place an order just by having the product URL, nothing else.

Also, the full retailer inventory is available, unlike FB or other models that require the shop to upload a certain number of products.