I can only tell you what I got, since apparently the Verizon rep bypassed the promo pages and sent me a GS2 direct from their warehouse.
I pre-ordered my S7 edge over the phone with Verizon on 2/23. She shipped my choice of promotional items (the GS2) right away, and I received on 2/25. During the pre-order she mentioned that the watch was free, but would require a $10 monthly access fee for data. This is the same as putting a tablet on your shared plan. At the end of the call, she dropped that fee to $5.00 per month. She didn't offer an explanation, simply said "by the way, I have something else for you...". IDK...maybe she found another promo she was able to give me. I have not looked at the offers on Samsung's site.
Sorry to add to the confusion, but I do know the 3g GS2 would require a data plan to be fully effective. Like my tablets, my GS2 has its own phone number. It was treated the same way had I added a tablet to my account, only at the last minute, she cut the price in half.