I had a questioned answered for Final Fantasy Mystic Quest. I wrote to them because I could not figure out how to get past a certain point (this was long before the internent and there was no way my parents would let me call the hot line) The cool thing is that they actually sent me a letter detailing how to get past the trouble I was having, then i was in print in the following issue.
I also won a T-Shirt through the monthly contest. I wish I still had it. I was handed down to my brother then probably went to Goodwill.