I don’t think the coupon code was a good idea to begin with, I suspect a lot of people obtained multiple licenses because of it. I was just trying to get 1 license as were many others. I understand you can’t just giveaway your product and make money to keep the business going. The thing is though, it does not speak well of a anti-malware software company to blink at the first sign of adversity when they initiated the offering to begin with, I mean if I buy the product what’s going to happen if I need to contact technical support for an issue with it and your just a little too busy, are you going to say “Tech support has exceeded our expectations sorry we can’t help you anymore”. The company should have taken into account that the more 1 year licenses you get out there the better chance you have of having those licenses renewed for a year or more because people have grown used to using it and can see how good the software is rather than act like your doing them a favor.
One last thing, you should not refer to this as a “Giveaway” because it obviously was not a giveaway, it was a promotional opportunity because in my case and others nothing was given away except our time and perhaps IP addresses trying to retrieve the promo from your site.
Just some advice…. You should offer a premium trial version instead of just the free version and perhaps have a giveaway contest for a certain number of licenses.