Group buying isn't a proven feature for websites, nor is it cross-site interaction universal. Visitors have to know what it is and trust it in a form of knowing what to expect and what not. That is the space SyncFu should occupy.
Basically, SyncFu is just a free* version of Groupon, Buywithme etc. The main reason for developing it is bringing this feature to any website without the 20-50% fees that these sites snatch. The only cost is the reservation fee, and it is charged to the customer, which is a dissolving cost.
You are certainly right about big vendors, if you throw a bunch of resources, it is too easy - but most little/medium web-shops deploy custom, features-less shopping carts - e.g. all the customers of Groupon and BuyWithMe.
Plus, I have no clue how would any company justify any costs of developing such a concept / experimental "feature". Well, for sure it isn't happening since there is very little innovation in online payments. Therefore this simple thing is isolated for any company to deploy on chosen products/services in a very simple manner.
Besides, this little component offers more than just group purchasing. Promotions are easily made, e.g:
- free signup for the first 100 reservations (price goes down to 0)
- pre-orderings of future books, directly by the author
This is of course my personal opinion, but SyncFu was built to verify the hypothesis :)
Thanks for the comment, and regarding the too easy, well, it took a long time to ditch features and shape minimal single feature product - praising Unix philosophy. The js code is of course publicly available:
http://github.com/dejanstrbac/SyncFu-Widget/blob/master/widg...