I'm glad that things worked out very well for me. I was not expecting anything from Metadot to be honest. The only reason I wrote to them was to let them know that their reseller in Canada was not doing a great job. Them offering me a free keyboard was just icing on the cake. But, it was a nice gesture from them. They knew that an unhappy customer would be bad for them. It we pause and think about it for a minute, it all makes sense.
Mechanical keyboard buyers are very few compared to all keyboard buyers, and usually the ones who bought one mechanical keyboard are the ones who come back to buy more. For example, most of us on geekhack.org like to have a mechanical keyboard on each of our home computers (some of us have more than one home computer), and a mechanical keyboard for our work computer. And in most cases, our workplace does not pay for the mechanical keyboard and will not pay $100 for a keyboard. Therefore, we buy our own keyboards for use at work. If was I unhappy wit a particular keyboard or its seller, I would not buy another one. Moreover, I would advised anyone who was thinking about getting that keyboard to think twice.
On the other hand, if I had very good service, especially in a case where they corrected a bad situation, they can be sure that not only would I recommend the keyboard to someone else, I would also mention the good customer service, which will a great selling point for the potential buyer.
In short, the chain reaction could be either positive or negative depending on the experience of one buyer.