It's a great idea. My two cents....
1 - It naturally works better for services, lodging, etc. No costs for shipping,warehousing, etc. Also, when a lodge or service company misses a day of service, that revenue is gone forever with no chance of recouping (at least without a time machine) so maybe more motivation to cut deals on slow times in the year.
2 - for actual products, would be better on those that ship direct from the manufacturer so that you don't need to deal with shipping, warehousing, returns, etc. With that in mind, it works best on higher-cost, smaller/easier to ship items. For example, the retailer margin on a $70 coleman stove might not be enough savings to justify the shipping expense and hassle overall, but what about a HDS fishfinder? Expensive (more margin), and relatively small/easy to ship.