The perfect neighbours?

Our neighbours have been clearing the entirety of our shared driveway since we moved in about four years ago, and I can't thank them enough. We never had to ask; they just started doing it. We left a gift card as a Christmas present after our first year here and they seemed... confused? Maybe even a bit startled? It was obvious they weren't really expecting it to be acknowledged, let alone appreciated! And boy do we -- we appreciate them so much!