many months ago the site experimented with random discounts, but the site paid for the difference. we never got the results, then out of no where, we are paying for that discount as well. there sort of was transparency, but the money taken out was the new part. but you can opt out if you want. but you are opted in by default.
i think the sales encourages those buyers that either put something in their cart or come by often. i don't know what the trigger is because its random. and then they buy something. i seem to be getting more sales because of it.
----Mike Savad
http://www.MikeSavad.com