They have exploded (as bargain hunters are very well aware).
Also, gives you some details on commissions etc they take (didn't know it was as high as 50%!!), some success and failure stories (not able to meet with demand etc, which we have seen a lot of, through this site) etc
http://www.smh.com.au/small-business/startup/chasing-a-barga…
wow 50%, i thought 30% was heaps
i would say 70/30 success/failure