If it is something I want then I will go ahead and make a purchase. It used to make me get things all the time, but I have gotten sick of getting junk that doesn't work for me, so I am more reluctant to just get whatever because it is free.
Oh yes, big time for me, Valentines week was fantastic and always look forward to the wipes everytime I order. I recently got a free inexpensive cinch harness that had a large enough O ring for my Maverick which worth more to me than anything else I've received so far.
Totally depends on the free product. If it is something I have or am not interested in then no it doesn't make a difference. If it is something I am interested in, I will go ahead and make a purchase I was putting off or look for something else to buy to the to the spending limit to get the gift.
Often the toy freebies do not interest me. I enjoy the free wipes with purchase though. A free t-shirt would definitely prompt an order. I don't want to pay for an item that advertises for a company,but if it was free, I'd wear it.