The direct cost to them is marginal if all you do is call them up on their 800 number and tell them you won't buy from them for Mother's Day (After all, who sends their mother flowers from a company that supports a misogynist?).
Sure, they pay for the incoming call, but it would take dozens of those to put a crimp in the profit from a single sale. However, if you go to their web site, there is a golden opportunity to REALLY put a dent in their margin. This is a tactic we used to use back in the 80s against folks like Jerry Falwell.
Back in the 80s, Jerry Falwell used to have a TV show called, "Old Time Gospel Hour" where he pimped his religion and made appeals for cash. We used to call in and pledge $100 bucks, $200 bucks, whatever we felt like. And then we would pull the name and address out of the phone book. For a $100 pledge, they used to send two copies of a lovely leather bound bible. That's a lot of money in shipping, etc. for something people didn't order. Of course, we didn't have the Internet back then and it never went viral.
Well today, we do have the net. Here's what you can do to poke a hole in ProFlowers pockets.
1) Go to their website: www.proflowers.com
2) scroll down to the black bar under their graphic image (the bar is the one where you can sign up for their email list)
3) click on "Sign Up for Catalog"
4) Fill in the fields... you don't need to put in a phone number.
Voila!
They will send the catalog and spend money on someone who isn't going to buy their product until they drop Rush like a bad habit.