I swapped out a load of business cards from the Sainsbury's business card bit. Nothing happened though, but seeing as you have to pay to put cards in there, i suspect someone noticed and stuck them in the bin.
I'm not sure exactly what you mean. Do Tesco have some places for anyone to put flyers then? I don't shop of Tesco, so wouldn't know.
Care to share bluetooh advertising method?
What program do you use.