Hey John, thank you for responding. I hope you take this as feedback, for I truly have no grudge or bitterness about it. If you looked at my resume and decided you're looking for something else, that's totally fine. I want to empathize with your role as an employer, and I ask that you do the same for me. As a candidate, I am applying to a dozen different places, amidst a busy life. Some communication helps keep everything together. It doesn't even have to be human but 1. Acknowledge receipt of my application. 2. Confirm that you've moved on to other applicants.

At some point, as your company grows, your recruiters may trawl the backlog of past applicants and decide to give me another look. It then becomes a question of how I remember my interactions with you. If you didn't have the time or systems to give me even the most cursory of feedback, you best believe I won't have the time to give you that either. So sure, there are hundreds of names, flying at you. But those names are people. A templated rejection letter is really the least you can do. Most applicant tracking systems support this.