I don't know about your usual business travels; but since you are GM traveling for business (i assume on those elite heavy days) and don't really seat in Y very often, I assume that your company pays pretty high fares and perhaps books you into F/J directly. Your experience would not be surprising if you fly a tone of full fare F/J/Y making you the "high revenue GM" who brings Delta more revenue than a DM who usually buys cheap tickets. If you are the "high revenue GM", sometimes you get a special mark and FAs/GAs can see it and then deliver better services to you. I can say for sure that giving you free wine/snack box without collecting coupons is not a common practice. Not every elite seating in Y gets those special treatments.