FRESHEST[/B] flowers available, yada, yada, yada.  But NEVER to we advertise 'fresh from the field'...because that is simply not true. 
Anyway, I understand your points - all very justified.  Also, when I see an order originate from our area - had one where I KNEW the sender - I question WHY.  He sent it through TEL.CON, and I recognized the recip. name as one of our customers.  When this happens, I immediately questioned MYSELF as to why this happened....did I fail to advertise properly, did we provide poor service to him in the past, or was it some goofy offer he got with his credit card statement?!?!?!???    I suppose the only way to know for sure would be to ask him!   
Lastly, about advertising to recipients...the 3-way card is the best idea I have used.  The stickers get missed, and CAN be a 'negative' item as seen by others.   BUT, it is VERY hard to get a GOOD return on this type of "advertising".  Watch how much $$$ you put into the program and track the returns.  Sometimes your PRODUCT is all you need, and in this case, may be the best form of advertisement...
 - H.