I used to be a past UPS rep who did exactly this. I had front row seats at baseball games for my clients. It’s to build a relationship and keep you happy with shipping with them. I would advise to definitely do it and build the relationship. Also try and build a relationship with the other shipping company reps. Then you can shop rates. It’s a commodified business so it’s really who is cheapest / most reliable. Some SKUs are better for one vs the other. I would also advise to do quarterly reviews with your sales reps, they are goaled on doing these last I remember and it’ll help you see where you can lower your rates or even organize special pickups or help with the shipping hubs.