Also keep in mind that if they DON'T send notices like this when they become aware of infringements, it can prevent them from challenging other, more serious infringements in the future (e.g. A competitor blatantly using the mark).
So this is most likely less to do with you and more to do with following legal protocols required to ensure you TM remains valid
So this is most likely less to do with you and more to do with following legal protocols required to ensure you TM remains valid